--- gforth/Attic/texinfo.tex	1995/09/06 21:00:32	1.3
+++ gforth/Attic/texinfo.tex	1997/04/05 16:49:20	1.4
@@ -1,6 +1,7 @@
 %% TeX macros to handle texinfo files
 
-%   Copyright (C) 1985, 86, 88, 90, 91, 92, 93, 1994 Free Software Foundation, Inc.
+%  Copyright (C) 1985, 86, 88, 90, 91, 92, 93,
+%                94, 95, 1996 Free Software Foundation, Inc.
 
 %This texinfo.tex file is free software; you can redistribute it and/or
 %modify it under the terms of the GNU General Public License as
@@ -14,38 +15,51 @@
 
 %You should have received a copy of the GNU General Public License
 %along with this texinfo.tex file; see the file COPYING.  If not, write
-%to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139,
-%USA.
+%to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+%Boston, MA 02111-1307, USA.
 
 
 %In other words, you are welcome to use, share and improve this program.
 %You are forbidden to forbid anyone else to use, share and improve
 %what you give them.   Help stamp out software-hoarding!
 
+
+% Send bug reports to bug-texinfo@prep.ai.mit.edu.
+% Please include a *precise* test case in each bug report.
+
+
+% Make it possible to create a .fmt file just by loading this file:
+% if the underlying format is not loaded, start by loading it now.
+% Added by gildea November 1993.
+\expandafter\ifx\csname fmtname\endcsname\relax\input plain\fi
+
 % This automatically updates the version number based on RCS.
 \def\deftexinfoversion$#1: #2 ${\def\texinfoversion{#2}}
-\deftexinfoversion$Revision: 1.3 $
+\deftexinfoversion$Revision: 1.4 $
 \message{Loading texinfo package [Version \texinfoversion]:}
 
-% Print the version number if in a .fmt file.
-\everyjob{\message{[Texinfo version \texinfoversion]}\message{}}
+% If in a .fmt file, print the version number
+% and turn on active characters that we couldn't do earlier because
+% they might have appeared in the input file name.
+\everyjob{\message{[Texinfo version \texinfoversion]}\message{}
+  \catcode`+=\active \catcode`\_=\active}
 
 % Save some parts of plain tex whose names we will redefine.
 
-\let\ptextilde=\~
-\let\ptexlbrace=\{
-\let\ptexrbrace=\}
-\let\ptexdots=\dots
-\let\ptexdot=\.
-\let\ptexstar=\*
-\let\ptexend=\end
-\let\ptexbullet=\bullet
 \let\ptexb=\b
+\let\ptexbullet=\bullet
 \let\ptexc=\c
+\let\ptexcomma=\,
+\let\ptexdot=\.
+\let\ptexdots=\dots
+\let\ptexend=\end
+\let\ptexequiv = \equiv
 \let\ptexi=\i
+\let\ptexlbrace=\{
+\let\ptexrbrace=\}
+\let\ptexstar=\*
 \let\ptext=\t
-\let\ptexl=\l
-\let\ptexL=\L
+\let\ptextilde=\~
 
 % Be sure we're in horizontal mode when doing a tie, since we make space
 % equivalent to this in @example-like environments. Otherwise, a space
@@ -53,10 +67,14 @@
 % since \penalty is valid in vertical mode, we'd end up putting the
 % penalty on the vertical list instead of in the new paragraph.
 {\catcode`@ = 11
- \gdef\tie{\leavevmode\penalty\@M\ }
+ % Avoid using \@M directly, because that causes trouble
+ % if the definition is written into an index file.
+ \global\let\tiepenalty = \@M
+ \gdef\tie{\leavevmode\penalty\tiepenalty\ }
 }
 \let\~ = \tie                  % And make it available as @~.
 
+
 \message{Basics,}
 \chardef\other=12
 
@@ -86,10 +104,9 @@
 \hyphenation{eshell}
 
 % Margin to add to right of even pages, to left of odd pages.
-\newdimen \bindingoffset  \bindingoffset=0pt
-\newdimen \normaloffset   \normaloffset=\hoffset
+\newdimen \bindingoffset  
+\newdimen \normaloffset   
 \newdimen\pagewidth \newdimen\pageheight
-\pagewidth=\hsize \pageheight=\vsize
 
 % Sometimes it is convenient to have everything in the transcript file
 % and nothing on the terminal.  We don't just call \tracingall here,
@@ -110,7 +127,7 @@
 \newdimen\cornerlong \newdimen\cornerthick
 \newdimen \topandbottommargin
 \newdimen \outerhsize \newdimen \outervsize
-\cornerlong=1pc\cornerthick=.3pt	% These set size of cropmarks
+\cornerlong=1pc\cornerthick=.3pt        % These set size of cropmarks
 \outerhsize=7in
 %\outervsize=9.5in
 % Alternative @smallbook page size is 9.25in
@@ -120,15 +137,24 @@
 %---------------------End change-----------------------
 
 % \onepageout takes a vbox as an argument.  Note that \pagecontents
-% does insertions itself, but you have to call it yourself.
+% does insertions, but you have to call it yourself.
 \chardef\PAGE=255  \output={\onepageout{\pagecontents\PAGE}}
-\def\onepageout#1{\hoffset=\normaloffset
-\ifodd\pageno  \advance\hoffset by \bindingoffset
-\else \advance\hoffset by -\bindingoffset\fi
-{\escapechar=`\\\relax % makes sure backslash is used in output files.
-\shipout\vbox{{\let\hsize=\pagewidth \makeheadline} \pagebody{#1}%
-{\let\hsize=\pagewidth \makefootline}}}%
-\advancepageno \ifnum\outputpenalty>-20000 \else\dosupereject\fi}
+\def\onepageout#1{%
+  \hoffset=\normaloffset
+  \ifodd\pageno  \advance\hoffset by \bindingoffset
+  \else \advance\hoffset by -\bindingoffset\fi
+  {%
+    \escapechar = `\\ % use backslash in output files.
+    \indexdummies
+    \shipout\vbox{%
+      {\let\hsize=\pagewidth \makeheadline}%
+      \pagebody{#1}%
+      {\let\hsize=\pagewidth \makefootline}%
+    }%
+  }%
+  \advancepageno
+  \ifnum\outputpenalty>-20000 \else\dosupereject\fi
+}
 
 %%%% For @cropmarks command %%%%
 
@@ -140,8 +166,8 @@
 %
 \def\croppageout#1{\hoffset=0pt % make sure this doesn't mess things up
 {\escapechar=`\\\relax % makes sure backslash is used in output files.
-		 \shipout
-		 \vbox to \outervsize{\hsize=\outerhsize
+                 \shipout
+                 \vbox to \outervsize{\hsize=\outerhsize
                  \vbox{\line{\ewtop\hfill\ewtop}}
                  \nointerlineskip
                  \line{\vbox{\moveleft\cornerthick\nstop}
@@ -149,19 +175,19 @@
                        \vbox{\moveright\cornerthick\nstop}}
                  \vskip \topandbottommargin
                  \centerline{\ifodd\pageno\hskip\bindingoffset\fi
-			\vbox{
-			{\let\hsize=\pagewidth \makeheadline}
-			\pagebody{#1}
-			{\let\hsize=\pagewidth \makefootline}}
-			\ifodd\pageno\else\hskip\bindingoffset\fi}
-		 \vskip \topandbottommargin plus1fill minus1fill
+                        \vbox{
+                        {\let\hsize=\pagewidth \makeheadline}
+                        \pagebody{#1}
+                        {\let\hsize=\pagewidth \makefootline}}
+                        \ifodd\pageno\else\hskip\bindingoffset\fi}
+                 \vskip \topandbottommargin plus1fill minus1fill
                  \boxmaxdepth\cornerthick
                  \line{\vbox{\moveleft\cornerthick\nsbot}
                        \hfill
                        \vbox{\moveright\cornerthick\nsbot}}
                  \nointerlineskip
                  \vbox{\line{\ewbot\hfill\ewbot}}
-	}}
+        }}
   \advancepageno
   \ifnum\outputpenalty>-20000 \else\dosupereject\fi}
 %
@@ -349,11 +375,43 @@
 %\def\'{{'}}
 
 % Used to generate quoted braces.
-
 \def\mylbrace {{\tt \char '173}}
 \def\myrbrace {{\tt \char '175}}
 \let\{=\mylbrace
 \let\}=\myrbrace
+\begingroup
+  % Definitions to produce actual \{ & \} command in an index.
+  \catcode`\{ = 12 \catcode`\} = 12
+  \catcode`\[ = 1 \catcode`\] = 2
+  \catcode`\@ = 0 \catcode`\\ = 12
+  @gdef@lbracecmd[\{]%
+  @gdef@rbracecmd[\}]%
+@endgroup
+
+% Accents: @, @dotaccent @ringaccent @ubaraccent @udotaccent
+% Others are defined by plain TeX: @` @' @" @^ @~ @= @v @H.
+\let\, = \c
+\let\dotaccent = \.
+\def\ringaccent#1{{\accent23 #1}}
+\let\tieaccent = \t
+\let\ubaraccent = \b
+\let\udotaccent = \d
+
+% Other special characters: @questiondown @exclamdown
+% Plain TeX defines: @AA @AE @O @OE @L (and lowercase versions) @ss.
+\def\questiondown{?`}
+\def\exclamdown{!`}
+
+% Dotless i and dotless j, used for accents.
+\def\imacro{i}
+\def\jmacro{j}
+\def\dotless#1{%
+  \def\temp{#1}%
+  \ifx\temp\imacro \ptexi
+  \else\ifx\temp\jmacro \j
+  \else \errmessage{@dotless can be used only with i or j}%
+  \fi\fi
+}
 
 % @: forces normal size whitespace following.
 \def\:{\spacefactor=1000 }
@@ -520,17 +578,34 @@ where each line of input produces a line
 \def\nofillexdentyyy #1{{\advance \leftskip by -\exdentamount
 \leftline{\hskip\leftskip{\rm#1}}}}
 
+% @inmargin{TEXT} puts TEXT in the margin next to the current paragraph.
+
+\def\inmargin#1{%
+\strut\vadjust{\nobreak\kern-\strutdepth
+  \vtop to \strutdepth{\baselineskip\strutdepth\vss
+  \llap{\rightskip=\inmarginspacing \vbox{\noindent #1}}\null}}}
+\newskip\inmarginspacing \inmarginspacing=1cm
+\def\strutdepth{\dp\strutbox}
+
 %\hbox{{\rm#1}}\hfil\break}}
 
 % @include file    insert text of that file as input.
-
-\def\include{\parsearg\includezzz}
-%Use \input\thisfile to avoid blank after \input, which may be an active
-%char (in which case the blank would become the \input argument).
-%The grouping keeps the value of \thisfile correct even when @include
-%is nested.
-\def\includezzz #1{\begingroup
-\def\thisfile{#1}\input\thisfile
+% Allow normal characters that  we make active in the argument (a file name).
+\def\include{\begingroup
+  \catcode`\\=12
+  \catcode`~=12
+  \catcode`^=12
+  \catcode`_=12
+  \catcode`|=12
+  \catcode`<=12
+  \catcode`>=12
+  \catcode`+=12
+  \parsearg\includezzz}
+% Restore active chars for included file.
+\def\includezzz#1{\endgroup\begingroup
+  % Read the included file in a group so nested @include's work.
+  \def\thisfile{#1}%
+  \input\thisfile
 \endgroup}
 
 \def\thisfile{}
@@ -545,7 +620,7 @@ where each line of input produces a line
 % @sp n   outputs n lines of vertical space
 
 \def\sp{\parsearg\spxxx}
-\def\spxxx #1{\par \vskip #1\baselineskip}
+\def\spxxx #1{\vskip #1\baselineskip}
 
 % @comment ...line which is ignored...
 % @c is the same as @comment
@@ -558,6 +633,9 @@ where each line of input produces a line
 
 \let\c=\comment
 
+% @paragraphindent  is defined for the Info formatting commands only.
+\let\paragraphindent=\comment
+
 % Prevent errors for section commands.
 % Used in @ignore and in failing conditionals.
 \def\ignoresections{%
@@ -592,6 +670,7 @@ where each line of input produces a line
 % incorrectly.
 %
 \def\ignoremorecommands{%
+  \let\defcodeindex = \relax
   \let\defcv = \relax
   \let\deffn = \relax
   \let\deffnx = \relax
@@ -615,6 +694,15 @@ where each line of input produces a line
   \let\printindex = \relax
   \let\pxref = \relax
   \let\settitle = \relax
+  \let\setchapternewpage = \relax
+  \let\setchapterstyle = \relax
+  \let\everyheading = \relax
+  \let\evenheading = \relax
+  \let\oddheading = \relax
+  \let\everyfooting = \relax
+  \let\evenfooting = \relax
+  \let\oddfooting = \relax
+  \let\headings = \relax
   \let\include = \relax
   \let\lowersections = \relax
   \let\down = \relax
@@ -623,7 +711,6 @@ where each line of input produces a line
   \let\set = \relax
   \let\clear = \relax
   \let\item = \relax
-  \let\message = \relax
 }
 
 % Ignore @ignore ... @end ignore.
@@ -638,6 +725,16 @@ where each line of input produces a line
 \def\menu{\doignore{menu}}
 \def\direntry{\doignore{direntry}}
 
+% Also ignore @macro ... @end macro.  The user must run texi2dvi,
+% which runs makeinfo to do macro expansion.  Ignore @unmacro, too.
+\def\macro{\doignore{macro}}
+\let\unmacro = \comment
+
+
+% @dircategory CATEGORY  -- specify a category of the dir file
+% which this file should belong to.  Ignore this in TeX.
+\let\dircategory = \comment
+
 % Ignore text until a line `@end #1'.
 %
 \def\doignore#1{\begingroup
@@ -669,11 +766,12 @@ where each line of input produces a line
     \immediate\write16{If you are running another version of TeX, relax.}
     \immediate\write16{If you are running Unix TeX 3.0, kill this TeX process.}
     \immediate\write16{  Then upgrade your TeX installation if you can.}
+    \immediate\write16{  (See ftp://ftp.gnu.ai.mit.edu/pub/gnu/TeX.README.)}
     \immediate\write16{If you are stuck with version 3.0, run the}
     \immediate\write16{  script ``tex3patch'' from the Texinfo distribution}
     \immediate\write16{  to use a workaround.}
     \immediate\write16{}
-    \warnedobstrue
+    \global\warnedobstrue
     \fi
 }
 
@@ -749,17 +847,22 @@ where each line of input produces a line
 % Since we want to separate VAR from REST-OF-LINE (which might be
 % empty), we can't just use \parsearg; we have to insert a space of our
 % own to delimit the rest of the line, and then take it out again if we
-% didn't need it.
+% didn't need it.  Make sure the catcode of space is correct to avoid
+% losing inside @example, for instance.
 %
-\def\set{\parsearg\setxxx}
+\def\set{\begingroup\catcode` =10 \parsearg\setxxx}
 \def\setxxx#1{\setyyy#1 \endsetyyy}
 \def\setyyy#1 #2\endsetyyy{%
   \def\temp{#2}%
   \ifx\temp\empty \global\expandafter\let\csname SET#1\endcsname = \empty
   \else \setzzz{#1}#2\endsetzzz % Remove the trailing space \setxxx inserted.
   \fi
+  \endgroup
 }
-\def\setzzz#1#2 \endsetzzz{\expandafter\xdef\csname SET#1\endcsname{#2}}
+% Can't use \xdef to pre-expand #2 and save some time, since \temp or
+% \next or other control sequences that we've defined might get us into
+% an infinite loop. Consider `@set foo @cite{bar}'.
+\def\setzzz#1#2 \endsetzzz{\expandafter\gdef\csname SET#1\endcsname{#2}}
 
 % @clear VAR clears (i.e., unsets) the variable VAR.
 %
@@ -769,9 +872,9 @@ where each line of input produces a line
 % @value{foo} gets the text saved in variable foo.
 %
 \def\value#1{\expandafter
-		\ifx\csname SET#1\endcsname\relax
-			{\{No value for ``#1''\}}
-		\else \csname SET#1\endcsname \fi}
+                \ifx\csname SET#1\endcsname\relax
+                        {\{No value for ``#1''\}}
+                \else \csname SET#1\endcsname \fi}
 
 % @ifset VAR ... @end ifset reads the `...' iff VAR has been defined
 % with @set.
@@ -871,6 +974,7 @@ where each line of input produces a line
 \expandafter\expandafter\expandafter\appendixsetref{\lastnode}\fi
 \global\let\lastnode=\relax}
 
+% @refill is a no-op.
 \let\refill=\relax
 
 % @setfilename is done at the beginning of every texinfo file.
@@ -885,11 +989,24 @@ where each line of input produces a line
    \comment % Ignore the actual filename.
 }
 
+% @bye.
 \outer\def\bye{\pagealignmacro\tracingstats=1\ptexend}
 
-\def\inforef #1{\inforefzzz #1,,,,**}
-\def\inforefzzz #1,#2,#3,#4**{\putwordSee{} \putwordInfo{} \putwordfile{} \file{\ignorespaces #3{}},
-  node \samp{\ignorespaces#1{}}}
+% \def\macro#1{\begingroup\ignoresections\catcode`\#=6\def\macrotemp{#1}\parsearg\macroxxx}
+% \def\macroxxx#1#2 \end macro{%
+% \expandafter\gdef\macrotemp#1{#2}%
+% \endgroup}
+
+%\def\linemacro#1{\begingroup\ignoresections\catcode`\#=6\def\macrotemp{#1}\parsearg\linemacroxxx}
+%\def\linemacroxxx#1#2 \end linemacro{%
+%\let\parsearg=\relax
+%\edef\macrotempx{\csname M\butfirst\expandafter\string\macrotemp\endcsname}%
+%\expandafter\xdef\macrotemp{\parsearg\macrotempx}%
+%\expandafter\gdef\macrotempx#1{#2}%
+%\endgroup}
+
+%\def\butfirst#1{}
+
 
 \message{fonts,}
 
@@ -901,12 +1018,16 @@ where each line of input produces a line
 \def\sf{\fam=\sffam \tensf}
 \let\li = \sf % Sometimes we call it \li, not \sf.
 
+% We don't need math for this one.
+\def\ttsl{\tenttsl}
+
 %% Try out Computer Modern fonts at \magstephalf
 \let\mainmagstep=\magstephalf
 
 % Set the font macro #1 to the font named #2, adding on the
 % specified font prefix (normally `cm').
-\def\setfont#1#2{\font#1=\fontprefix#2}
+% #3 is the font's design size, #4 is a scale factor
+\def\setfont#1#2#3#4{\font#1=\fontprefix#2#3 scaled #4}
 
 % Use cm as the default font prefix.
 % To specify the font prefix, you must define \fontprefix
@@ -914,96 +1035,119 @@ where each line of input produces a line
 \ifx\fontprefix\undefined
 \def\fontprefix{cm}
 \fi
+% Support font families that don't use the same naming scheme as CM.
+\def\rmshape{r}
+\def\rmbshape{bx}               %where the normal face is bold
+\def\bfshape{b}
+\def\bxshape{bx}
+\def\ttshape{tt}
+\def\ttbshape{tt}
+\def\ttslshape{sltt}
+\def\itshape{ti}
+\def\itbshape{bxti}
+\def\slshape{sl}
+\def\slbshape{bxsl}
+\def\sfshape{ss}
+\def\sfbshape{ss}
+\def\scshape{csc}
+\def\scbshape{csc}
 
 \ifx\bigger\relax
 \let\mainmagstep=\magstep1
-\setfont\textrm{r12}
-\setfont\texttt{tt12}
+\setfont\textrm\rmshape{12}{1000}
+\setfont\texttt\ttshape{12}{1000}
 \else
-\setfont\textrm{r10 scaled \mainmagstep}
-\setfont\texttt{tt10 scaled \mainmagstep}
+\setfont\textrm\rmshape{10}{\mainmagstep}
+\setfont\texttt\ttshape{10}{\mainmagstep}
 \fi
 % Instead of cmb10, you many want to use cmbx10.
 % cmbx10 is a prettier font on its own, but cmb10
 % looks better when embedded in a line with cmr10.
-\setfont\textbf{b10 scaled \mainmagstep}
-\setfont\textit{ti10 scaled \mainmagstep}
-\setfont\textsl{sl10 scaled \mainmagstep}
-\setfont\textsf{ss10 scaled \mainmagstep}
-\setfont\textsc{csc10 scaled \mainmagstep}
+\setfont\textbf\bfshape{10}{\mainmagstep}
+\setfont\textit\itshape{10}{\mainmagstep}
+\setfont\textsl\slshape{10}{\mainmagstep}
+\setfont\textsf\sfshape{10}{\mainmagstep}
+\setfont\textsc\scshape{10}{\mainmagstep}
+\setfont\textttsl\ttslshape{10}{\mainmagstep}
 \font\texti=cmmi10 scaled \mainmagstep
 \font\textsy=cmsy10 scaled \mainmagstep
 
 % A few fonts for @defun, etc.
-\setfont\defbf{bx10 scaled \magstep1} %was 1314
-\setfont\deftt{tt10 scaled \magstep1}
+\setfont\defbf\bxshape{10}{\magstep1} %was 1314
+\setfont\deftt\ttshape{10}{\magstep1}
 \def\df{\let\tentt=\deftt \let\tenbf = \defbf \bf}
 
-% Fonts for indices and small examples.
+% Fonts for indices and small examples (9pt).
 % We actually use the slanted font rather than the italic,
 % because texinfo normally uses the slanted fonts for that.
 % Do not make many font distinctions in general in the index, since they
 % aren't very useful.
-\setfont\ninett{tt9}
-\setfont\indrm{r9}
-\setfont\indit{sl9}
+\setfont\ninett\ttshape{9}{1000}
+\setfont\indrm\rmshape{9}{1000}
+\setfont\indit\slshape{9}{1000}
 \let\indsl=\indit
 \let\indtt=\ninett
+\let\indttsl=\ninett
 \let\indsf=\indrm
 \let\indbf=\indrm
-\let\indsc=\indrm
+\setfont\indsc\scshape{10}{900}
 \font\indi=cmmi9
 \font\indsy=cmsy9
 
-% Fonts for headings
-\setfont\chaprm{bx12 scaled \magstep2}
-\setfont\chapit{ti12 scaled \magstep2}
-\setfont\chapsl{sl12 scaled \magstep2}
-\setfont\chaptt{tt12 scaled \magstep2}
-\setfont\chapsf{ss12 scaled \magstep2}
+% Chapter (and unnumbered) fonts (17.28pt).
+\setfont\chaprm\rmbshape{12}{\magstep2}
+\setfont\chapit\itbshape{10}{\magstep3}
+\setfont\chapsl\slbshape{10}{\magstep3}
+\setfont\chaptt\ttbshape{12}{\magstep2}
+\setfont\chapttsl\ttslshape{10}{\magstep3}
+\setfont\chapsf\sfbshape{12}{\magstep2}
 \let\chapbf=\chaprm
-\setfont\chapsc{csc10 scaled\magstep3}
+\setfont\chapsc\scbshape{10}{\magstep3}
 \font\chapi=cmmi12 scaled \magstep2
 \font\chapsy=cmsy10 scaled \magstep3
 
-\setfont\secrm{bx12 scaled \magstep1}
-\setfont\secit{ti12 scaled \magstep1}
-\setfont\secsl{sl12 scaled \magstep1}
-\setfont\sectt{tt12 scaled \magstep1}
-\setfont\secsf{ss12 scaled \magstep1}
-\setfont\secbf{bx12 scaled \magstep1}
-\setfont\secsc{csc10 scaled\magstep2}
+% Section fonts (14.4pt).
+\setfont\secrm\rmbshape{12}{\magstep1}
+\setfont\secit\itbshape{10}{\magstep2}
+\setfont\secsl\slbshape{10}{\magstep2}
+\setfont\sectt\ttbshape{12}{\magstep1}
+\setfont\secttsl\ttslshape{10}{\magstep2}
+\setfont\secsf\sfbshape{12}{\magstep1}
+\let\secbf\secrm
+\setfont\secsc\scbshape{10}{\magstep2}
 \font\seci=cmmi12 scaled \magstep1
 \font\secsy=cmsy10 scaled \magstep2
 
-% \setfont\ssecrm{bx10 scaled \magstep1}    % This size an font looked bad.
-% \setfont\ssecit{cmti10 scaled \magstep1}    % The letters were too crowded.
-% \setfont\ssecsl{sl10 scaled \magstep1}
-% \setfont\ssectt{tt10 scaled \magstep1}
-% \setfont\ssecsf{ss10 scaled \magstep1}
-
-%\setfont\ssecrm{b10 scaled 1315}	% Note the use of cmb rather than cmbx.
-%\setfont\ssecit{ti10 scaled 1315}	% Also, the size is a little larger than
-%\setfont\ssecsl{sl10 scaled 1315}	% being scaled magstep1.
-%\setfont\ssectt{tt10 scaled 1315}
-%\setfont\ssecsf{ss10 scaled 1315}
+% \setfont\ssecrm\bxshape{10}{\magstep1}    % This size an font looked bad.
+% \setfont\ssecit\itshape{10}{\magstep1}    % The letters were too crowded.
+% \setfont\ssecsl\slshape{10}{\magstep1}
+% \setfont\ssectt\ttshape{10}{\magstep1}
+% \setfont\ssecsf\sfshape{10}{\magstep1}
+
+%\setfont\ssecrm\bfshape{10}{1315}      % Note the use of cmb rather than cmbx.
+%\setfont\ssecit\itshape{10}{1315}      % Also, the size is a little larger than
+%\setfont\ssecsl\slshape{10}{1315}      % being scaled magstep1.
+%\setfont\ssectt\ttshape{10}{1315}
+%\setfont\ssecsf\sfshape{10}{1315}
 
 %\let\ssecbf=\ssecrm
 
-\setfont\ssecrm{bx12 scaled \magstephalf}
-\setfont\ssecit{ti12 scaled \magstephalf}
-\setfont\ssecsl{sl12 scaled \magstephalf}
-\setfont\ssectt{tt12 scaled \magstephalf}
-\setfont\ssecsf{ss12 scaled \magstephalf}
-\setfont\ssecbf{bx12 scaled \magstephalf}
-\setfont\ssecsc{csc10 scaled \magstep1}
+% Subsection fonts (13.15pt).
+\setfont\ssecrm\rmbshape{12}{\magstephalf}
+\setfont\ssecit\itbshape{10}{1315}
+\setfont\ssecsl\slbshape{10}{1315}
+\setfont\ssectt\ttbshape{12}{\magstephalf}
+\setfont\ssecttsl\ttslshape{10}{\magstep1}
+\setfont\ssecsf\sfbshape{12}{\magstephalf}
+\let\ssecbf\ssecrm
+\setfont\ssecsc\scbshape{10}{\magstep1}
 \font\sseci=cmmi12 scaled \magstephalf
 \font\ssecsy=cmsy10 scaled \magstep1
 % The smallcaps and symbol fonts should actually be scaled \magstep1.5,
 % but that is not a standard magnification.
 
 % Fonts for title page:
-\setfont\titlerm{bx12 scaled \magstep3}
+\setfont\titlerm\rmbshape{12}{\magstep3}
 \let\authorrm = \secrm
 
 % In order for the font changes to affect most math symbols and letters,
@@ -1022,34 +1166,35 @@ where each line of input produces a line
 % The font-changing commands redefine the meanings of \tenSTYLE, instead
 % of just \STYLE.  We do this so that font changes will continue to work
 % in math mode, where it is the current \fam that is relevant in most
-% cases, not the current.  Plain TeX does, for example,
-% \def\bf{\fam=\bffam \tenbf}  By redefining \tenbf, we obviate the need
-% to redefine \bf itself.
+% cases, not the current font.  Plain TeX does \def\bf{\fam=\bffam
+% \tenbf}, for example.  By redefining \tenbf, we obviate the need to
+% redefine \bf itself.
 \def\textfonts{%
   \let\tenrm=\textrm \let\tenit=\textit \let\tensl=\textsl
   \let\tenbf=\textbf \let\tentt=\texttt \let\smallcaps=\textsc
-  \let\tensf=\textsf \let\teni=\texti \let\tensy=\textsy
+  \let\tensf=\textsf \let\teni=\texti \let\tensy=\textsy \let\tenttsl=\textttsl
   \resetmathfonts}
 \def\chapfonts{%
   \let\tenrm=\chaprm \let\tenit=\chapit \let\tensl=\chapsl
   \let\tenbf=\chapbf \let\tentt=\chaptt \let\smallcaps=\chapsc
-  \let\tensf=\chapsf \let\teni=\chapi \let\tensy=\chapsy
-  \resetmathfonts}
+  \let\tensf=\chapsf \let\teni=\chapi \let\tensy=\chapsy \let\tenttsl=\chapttsl
+  \resetmathfonts \setleading{19pt}}
 \def\secfonts{%
   \let\tenrm=\secrm \let\tenit=\secit \let\tensl=\secsl
   \let\tenbf=\secbf \let\tentt=\sectt \let\smallcaps=\secsc
-  \let\tensf=\secsf \let\teni=\seci \let\tensy=\secsy
-  \resetmathfonts}
+  \let\tensf=\secsf \let\teni=\seci \let\tensy=\secsy \let\tenttsl=\secttsl
+  \resetmathfonts \setleading{16pt}}
 \def\subsecfonts{%
   \let\tenrm=\ssecrm \let\tenit=\ssecit \let\tensl=\ssecsl
   \let\tenbf=\ssecbf \let\tentt=\ssectt \let\smallcaps=\ssecsc
-  \let\tensf=\ssecsf \let\teni=\sseci \let\tensy=\ssecsy
-  \resetmathfonts}
+  \let\tensf=\ssecsf \let\teni=\sseci \let\tensy=\ssecsy \let\tenttsl=\ssecttsl
+  \resetmathfonts \setleading{15pt}}
+\let\subsubsecfonts = \subsecfonts % Maybe make sssec fonts scaled magstephalf?
 \def\indexfonts{%
   \let\tenrm=\indrm \let\tenit=\indit \let\tensl=\indsl
   \let\tenbf=\indbf \let\tentt=\indtt \let\smallcaps=\indsc
-  \let\tensf=\indsf \let\teni=\indi \let\tensy=\indsy
-  \resetmathfonts}
+  \let\tensf=\indsf \let\teni=\indi \let\tensy=\indsy \let\tenttsl=\indttsl
+  \resetmathfonts \setleading{12pt}}
 
 % Set up the default fonts, so we can use them for creating boxes.
 %
@@ -1059,9 +1204,9 @@ where each line of input produces a line
 \newcount\fontdepth \fontdepth=0
 
 % Fonts for short table of contents.
-\setfont\shortcontrm{r12}
-\setfont\shortcontbf{bx12}
-\setfont\shortcontsl{sl12}
+\setfont\shortcontrm\rmshape{12}{1000}
+\setfont\shortcontbf\bxshape{12}{1000}
+\setfont\shortcontsl\slshape{12}{1000}
 
 %% Add scribe-like font environments, plus @l for inline lisp (usually sans
 %% serif) and @ii for TeX italic
@@ -1088,16 +1233,26 @@ where each line of input produces a line
 \def\restorehyphenation{\hyphenchar\font = `- }
 
 \def\t#1{%
-  {\tt \nohyphenation \rawbackslash \frenchspacing #1}%
+  {\tt \rawbackslash \frenchspacing #1}%
   \null
 }
-\let\ttfont = \t
-%\def\samp #1{`{\tt \rawbackslash \frenchspacing #1}'\null}
+\let\ttfont=\t
 \def\samp #1{`\tclose{#1}'\null}
-\def\key #1{{\tt \nohyphenation \uppercase{#1}}\null}
+\setfont\smallrm\rmshape{8}{1000}
+\font\smallsy=cmsy9
+\def\key#1{{\smallrm\textfont2=\smallsy \leavevmode\hbox{%
+  \raise0.4pt\hbox{$\langle$}\kern-.08em\vtop{%
+    \vbox{\hrule\kern-0.4pt
+     \hbox{\raise0.4pt\hbox{\vphantom{$\langle$}}#1}}%
+    \kern-0.4pt\hrule}%
+  \kern-.06em\raise0.4pt\hbox{$\rangle$}}}}
+% The old definition, with no lozenge:
+%\def\key #1{{\ttsl \nohyphenation \uppercase{#1}}\null}
 \def\ctrl #1{{\tt \rawbackslash \hat}#1}
 
 \let\file=\samp
+\let\url=\samp % perhaps include a hypertex \special eventually
+\def\email#1{$\langle${\tt #1}$\rangle$}
 
 % @code is a modification of @t,
 % which makes spaces the same size as normal in the surrounding text.
@@ -1123,13 +1278,13 @@ where each line of input produces a line
 }
 
 % We *must* turn on hyphenation at `-' and `_' in \code.
-% Otherwise, it is too hard to avoid overful hboxes
+% Otherwise, it is too hard to avoid overfull hboxes
 % in the Emacs manual, the Library manual, etc.
 
 % Unfortunately, TeX uses one parameter (\hyphenchar) to control
 % both hyphenation at - and hyphenation within words.
 % We must therefore turn them both off (\tclose does that)
-% and arrange explicitly to hyphenate an a dash.
+% and arrange explicitly to hyphenate at a dash.
 %  -- rms.
 {
 \catcode`\-=\active
@@ -1141,6 +1296,7 @@ where each line of input produces a line
 % ever called.  -- mycroft
 \global\def\indexbreaks{\catcode`\-=\active \let-\realdash \catcode`\_=\active \let_\realunder}
 }
+
 \def\realdash{-}
 \def\realunder{_}
 \def\codedash{-\discretionary{}{}{}}
@@ -1151,12 +1307,19 @@ where each line of input produces a line
 
 % @kbd is like @code, except that if the argument is just one @key command,
 % then @kbd has no effect.
-
+%
 \def\xkey{\key}
 \def\kbdfoo#1#2#3\par{\def\one{#1}\def\three{#3}\def\threex{??}%
 \ifx\one\xkey\ifx\threex\three \key{#2}%
-\else\tclose{\look}\fi
-\else\tclose{\look}\fi}
+\else{\tclose{\ttsl\look}}\fi
+\else{\tclose{\ttsl\look}}\fi}
+
+% Check if we are currently using a typewriter font.  Since all the
+% Computer Modern typewriter fonts have zero interword stretch (and
+% shrink), and it is reasonable to expect all typewriter fonts to have
+% this property, we can check that font parameter.
+% 
+\def\ifmonospace{\ifdim\fontdimen3\font=0pt }
 
 % Typeset a dimension, e.g., `in' or `pt'.  The only reason for the
 % argument is to make the input look right: @dmn{pt} instead of
@@ -1166,12 +1329,19 @@ where each line of input produces a line
 
 \def\kbd#1{\def\look{#1}\expandafter\kbdfoo\look??\par}
 
-\def\l#1{{\li #1}\null}		%
+% @l was never documented to mean ``switch to the Lisp font'',
+% and it is not used as such in any manual I can find.  We need it for
+% Polish suppressed-l.  --karl, 22sep96.
+%\def\l#1{{\li #1}\null}
 
-\def\r#1{{\rm #1}}		% roman font
+\def\r#1{{\rm #1}}              % roman font
 % Use of \lowercase was suggested.
-\def\sc#1{{\smallcaps#1}}	% smallcaps font
-\def\ii#1{{\it #1}}		% italic font
+\def\sc#1{{\smallcaps#1}}       % smallcaps font
+\def\ii#1{{\it #1}}             % italic font
+
+% @pounds{} is a sterling sign.
+\def\pounds{{\it\$}}
+
 
 \message{page headings,}
 
@@ -1186,7 +1356,7 @@ where each line of input produces a line
 
 \def\shorttitlepage{\parsearg\shorttitlepagezzz}
 \def\shorttitlepagezzz #1{\begingroup\hbox{}\vskip 1.5in \chaprm \centerline{#1}%
-	\endgroup\page\hbox{}\page}
+        \endgroup\page\hbox{}\page}
 
 \def\titlepage{\begingroup \parindent=0pt \textfonts
    \let\subtitlerm=\tenrm
@@ -1203,9 +1373,9 @@ where each line of input produces a line
    % Now you can print the title using @title.
    \def\title{\parsearg\titlezzz}%
    \def\titlezzz##1{\leftline{\titlefont{##1}}
-		    % print a rule at the page bottom also.
-		    \finishedtitlepagefalse
-		    \vskip4pt \hrule height 4pt width \hsize \vskip4pt}%
+                    % print a rule at the page bottom also.
+                    \finishedtitlepagefalse
+                    \vskip4pt \hrule height 4pt width \hsize \vskip4pt}%
    % No rule at page bottom unless we print one at the top with @title.
    \finishedtitlepagetrue
    %
@@ -1223,7 +1393,7 @@ where each line of input produces a line
    \let\oldpage = \page
    \def\page{%
       \iffinishedtitlepage\else
-	 \finishtitlepage
+         \finishtitlepage
       \fi
       \oldpage
       \let\page = \oldpage
@@ -1311,14 +1481,15 @@ where each line of input produces a line
 %
 }% unbind the catcode of @.
 
-% @headings double	turns headings on for double-sided printing.
-% @headings single	turns headings on for single-sided printing.
-% @headings off		turns them off.
-% @headings on		same as @headings double, retained for compatibility.
-% @headings after	turns on double-sided headings after this page.
-% @headings doubleafter	turns on double-sided headings after this page.
+% @headings double      turns headings on for double-sided printing.
+% @headings single      turns headings on for single-sided printing.
+% @headings off         turns them off.
+% @headings on          same as @headings double, retained for compatibility.
+% @headings after       turns on double-sided headings after this page.
+% @headings doubleafter turns on double-sided headings after this page.
 % @headings singleafter turns on single-sided headings after this page.
-% By default, they are off.
+% By default, they are off at the start of a document,
+% and turned `on' after @end titlepage.
 
 \def\headings #1 {\csname HEADINGS#1\endcsname}
 
@@ -1332,22 +1503,24 @@ where each line of input produces a line
 % title on inside top of left hand pages, and page numbers on outside top
 % edge of all pages.
 \def\HEADINGSdouble{
-%\pagealignmacro
 \global\pageno=1
 \global\evenfootline={\hfil}
 \global\oddfootline={\hfil}
 \global\evenheadline={\line{\folio\hfil\thistitle}}
 \global\oddheadline={\line{\thischapter\hfil\folio}}
+\global\let\contentsalignmacro = \chapoddpage
 }
+\let\contentsalignmacro = \chappager
+
 % For single-sided printing, chapter title goes across top left of page,
 % page number on top right.
 \def\HEADINGSsingle{
-%\pagealignmacro
 \global\pageno=1
 \global\evenfootline={\hfil}
 \global\oddfootline={\hfil}
 \global\evenheadline={\line{\thischapter\hfil\folio}}
 \global\oddheadline={\line{\thischapter\hfil\folio}}
+\global\let\contentsalignmacro = \chappager
 }
 \def\HEADINGSon{\HEADINGSdouble}
 
@@ -1358,6 +1531,7 @@ where each line of input produces a line
 \global\oddfootline={\hfil}
 \global\evenheadline={\line{\folio\hfil\thistitle}}
 \global\oddheadline={\line{\thischapter\hfil\folio}}
+\global\let\contentsalignmacro = \chapoddpage
 }
 
 \def\HEADINGSsingleafter{\let\HEADINGShook=\HEADINGSsinglex}
@@ -1366,6 +1540,7 @@ where each line of input produces a line
 \global\oddfootline={\hfil}
 \global\evenheadline={\line{\thischapter\hfil\folio}}
 \global\oddheadline={\line{\thischapter\hfil\folio}}
+\global\let\contentsalignmacro = \chappager
 }
 
 % Subroutines used in generating headings
@@ -1389,6 +1564,7 @@ July\or August\or September\or October\o
 \def\settitle{\parsearg\settitlezzz}
 \def\settitlezzz #1{\gdef\thistitle{#1}}
 
+
 \message{tables,}
 
 % @tabs -- simple alignment
@@ -1421,7 +1597,7 @@ July\or August\or September\or October\o
 
 \newif\ifitemxneedsnegativevskip
 
-\def\itemxpar{\par\ifitemxneedsnegativevskip\vskip-\parskip\nobreak\fi}
+\def\itemxpar{\par\ifitemxneedsnegativevskip\nobreak\vskip-\parskip\nobreak\fi}
 
 \def\internalBitem{\smallbreak \parsearg\itemzzz}
 \def\internalBitemx{\itemxpar \parsearg\itemzzz}
@@ -1528,7 +1704,7 @@ July\or August\or September\or October\o
 \def\tablez #1#2#3#4#5#6{%
 \aboveenvbreak %
 \begingroup %
-\def\Edescription{\Etable}% Neccessary kludge.
+\def\Edescription{\Etable}% Necessary kludge.
 \let\itemindex=#1%
 \ifnum 0#3>0 \advance \leftskip by #3\mil \fi %
 \ifnum 0#4>0 \tableindent=#4\mil \fi %
@@ -1692,10 +1868,10 @@ July\or August\or September\or October\o
 \flushcr}
 
 % @multitable macros
-% Amy Hendrickson, 8/18/94
+% Amy Hendrickson, 8/18/94, 3/6/96
 %
-% @multitable ... @endmultitable will make as many columns as desired.
-% Contents of each column will wrap at width given in preamble. Width
+% @multitable ... @end multitable will make as many columns as desired.
+% Contents of each column will wrap at width given in preamble.  Width
 % can be specified either with sample text given in a template line,
 % or in percent of \hsize, the current width of text on page.
 
@@ -1704,25 +1880,35 @@ July\or August\or September\or October\o
 % To make preamble:
 %
 % Either define widths of columns in terms of percent of \hsize: 
-%   @multitable @percentofhsize .2 .3 .5
+%   @multitable @columnfractions .25 .3 .45
 %   @item ...
 %
-%   Numbers following @percentofhsize are the percent of the total
+%   Numbers following @columnfractions are the percent of the total
 %   current hsize to be used for each column. You may use as many
 %   columns as desired.
 
+
 % Or use a template:
 %   @multitable {Column 1 template} {Column 2 template} {Column 3 template}
 %   @item ...
 %   using the widest term desired in each column.
-
+%
+% For those who want to use more than one line's worth of words in
+% the preamble, break the line within one argument and it
+% will parse correctly, i.e.,
+%
+%     @multitable {Column 1 template} {Column 2 template} {Column 3 
+%      template}
+% Not:
+%     @multitable {Column 1 template} {Column 2 template} 
+%      {Column 3 template}
 
 % Each new table line starts with @item, each subsequent new column 
 % starts with @tab. Empty columns may be produced by supplying @tab's
 % with nothing between them for as many times as empty columns are needed,
 % ie, @tab@tab@tab will produce two empty columns.
 
-% @item, @tab, @multicolumn or @endmulticolumn do not need to be on their
+% @item, @tab, @multitable or @end multitable do not need to be on their
 % own lines, but it will not hurt if they are.
 
 % Sample multitable:
@@ -1740,71 +1926,86 @@ July\or August\or September\or October\o
 %     
 %         They will wrap at the width determined by the template.
 %   @item@tab@tab This will be in third column.
-%   @endmultitable
+%   @end multitable
 
 % Default dimensions may be reset by user.
-% @intableparskip will set vertical space between paragraphs in table.
-% @intableparindent will set paragraph indent in table.
-% @spacebetweencols will set horizontal space to be left between columns.
-% @spacebetweenlines will set vertical space to be left between lines.
+% @multitableparskip is vertical space between paragraphs in table.
+% @multitableparindent is paragraph indent in table.
+% @multitablecolmargin is horizontal space to be left between columns.
+% @multitablelinespace is space to leave between table items, baseline
+%                                                            to baseline.
+%   0pt means it depends on current normal line spacing.
 
 %%%%
 % Dimensions 
 
-\newdimen\intableparskip
-\newdimen\intableparindent
-\newdimen\spacebetweencols
-\newdimen\spacebetweenlines
-\intableparskip=0pt
-\intableparindent=6pt
-\spacebetweencols=12pt
-\spacebetweenlines=12pt
+\newskip\multitableparskip
+\newskip\multitableparindent
+\newdimen\multitablecolspace
+\newskip\multitablelinespace
+\multitableparskip=0pt
+\multitableparindent=6pt
+\multitablecolspace=12pt
+\multitablelinespace=0pt
 
 %%%%
 % Macros used to set up halign preamble:
 \let\endsetuptable\relax
 \def\xendsetuptable{\endsetuptable}
-\let\percentofhsize\relax
-\def\xpercentofhsize{\percentofhsize}
+\let\columnfractions\relax
+\def\xcolumnfractions{\columnfractions}
 \newif\ifsetpercent
 
+%% 2/1/96, to allow fractions to be given with more than one digit.
+\def\pickupwholefraction#1 {\global\advance\colcount by1 %
+\expandafter\xdef\csname col\the\colcount\endcsname{.#1\hsize}%
+\setuptable}
+
 \newcount\colcount
 \def\setuptable#1{\def\firstarg{#1}%
 \ifx\firstarg\xendsetuptable\let\go\relax%
 \else
-  \ifx\firstarg\xpercentofhsize\global\setpercenttrue%
+  \ifx\firstarg\xcolumnfractions\global\setpercenttrue%
   \else
     \ifsetpercent
-       \if#1.\else%
-       \global\advance\colcount by1 %
-       \expandafter\xdef\csname col\the\colcount\endcsname{.#1\hsize}%
-       \fi
+       \let\go\pickupwholefraction   % In this case arg of setuptable
+                                     % is the decimal point before the
+                                     % number given in percent of hsize.
+                                     % We don't need this so we don't use it.
     \else
        \global\advance\colcount by1
-       \setbox0=\hbox{#1}%
+       \setbox0=\hbox{#1 }% Add a normal word space as a separator;
+                          % typically that is always in the input, anyway.
        \expandafter\xdef\csname col\the\colcount\endcsname{\the\wd0}%
     \fi%
   \fi%
-  \let\go\setuptable%
+\ifx\go\pickupwholefraction\else\let\go\setuptable\fi%
 \fi\go}
+
 %%%%
 % multitable syntax
-\def\tab{&}
+\def\tab{&\hskip1sp\relax} % 2/2/96
+                           % tiny skip here makes sure this column space is
+                           % maintained, even if it is never used.
+
 
 %%%%
-% @multitable ... @endmultitable definitions:
+% @multitable ... @end multitable definitions:
 
-\def\multitable#1\item{\bgroup
+\def\multitable{\parsearg\dotable}
+
+\def\dotable#1{\bgroup
 \let\item\cr
 \tolerance=9500
 \hbadness=9500
-\parskip=\intableparskip
-\parindent=\intableparindent
+\setmultitablespacing
+\parskip=\multitableparskip
+\parindent=\multitableparindent
 \overfullrule=0pt
 \global\colcount=0\relax%
 \def\Emultitable{\global\setpercentfalse\global\everycr{}\cr\egroup\egroup}%
  % To parse everything between @multitable and @item :
-\def\one{#1}\expandafter\setuptable\one\endsetuptable
+\setuptable#1 \endsetuptable
  % Need to reset this to 0 after \setuptable.
 \global\colcount=0\relax% 
  %
@@ -1813,11 +2014,11 @@ July\or August\or September\or October\o
  % \vtop will set a single line and will also let text wrap and 
  % continue for many paragraphs if desired.
 \halign\bgroup&\global\advance\colcount by 1\relax%
-\vtop{\hsize=\expandafter\csname col\the\colcount\endcsname
+\multistrut\vtop{\hsize=\expandafter\csname col\the\colcount\endcsname
  % In order to keep entries from bumping into each other
- % we will add a \leftskip of \spacebetweencols to all columns after
+ % we will add a \leftskip of \multitablecolspace to all columns after
  % the first one.
- %  If a template has been used, we will add \spacebetweencols 
+ %  If a template has been used, we will add \multitablecolspace 
  % to the width of each template entry.
  %  If user has set preamble in terms of percent of \hsize
  % we will use that dimension as the width of the column, and
@@ -1829,20 +2030,46 @@ July\or August\or September\or October\o
   \ifsetpercent
   \else
    % If user has <not> set preamble in terms of percent of \hsize
-   % we will advance \hsize by \spacebetweencols 
-  \advance\hsize by \spacebetweencols
+   % we will advance \hsize by \multitablecolspace 
+  \advance\hsize by \multitablecolspace
   \fi
- % In either case we will make \leftskip=\spacebetweencols:
-\leftskip=\spacebetweencols
+ % In either case we will make \leftskip=\multitablecolspace:
+\leftskip=\multitablecolspace
 \fi
-\noindent##}\cr%
+\noindent##\multistrut}\cr%
  % \everycr will reset column counter, \colcount, at the end of
  % each line. Every column  entry will cause \colcount to advance by one. 
  % The table preamble
  % looks at the current \colcount to find the correct column width.
-\global\everycr{\noalign{\nointerlineskip\vskip\spacebetweenlines
+\global\everycr{\noalign{%
 \filbreak%% keeps underfull box messages off when table breaks over pages.
-\global\colcount=0\relax}}}
+\global\colcount=0\relax}}
+}
+
+\def\setmultitablespacing{% test to see if user has set \multitablelinespace.
+% If so, do nothing. If not, give it an appropriate dimension based on
+% current baselineskip.
+\ifdim\multitablelinespace=0pt
+%% strut to put in table in case some entry doesn't have descenders,
+%% to keep lines equally spaced
+\let\multistrut = \strut
+%% Test to see if parskip is larger than space between lines of
+%% table. If not, do nothing. 
+%%        If so, set to same dimension as multitablelinespace.
+\else
+\gdef\multistrut{\vrule height\multitablelinespace depth\dp0
+width0pt\relax} \fi
+\ifdim\multitableparskip>\multitablelinespace
+\global\multitableparskip=\multitablelinespace
+\global\advance\multitableparskip-7pt %% to keep parskip somewhat smaller
+                                      %% than skip between lines in the table.
+\fi%
+\ifdim\multitableparskip=0pt
+\global\multitableparskip=\multitablelinespace
+\global\advance\multitableparskip-7pt %% to keep parskip somewhat smaller
+                                      %% than skip between lines in the table.
+\fi}
+
 
 \message{indexing,}
 % Index generation facilities
@@ -1856,14 +2083,14 @@ July\or August\or September\or October\o
 % It automatically defines \fooindex such that
 % \fooindex ...rest of line... puts an entry in the index foo.
 % It also defines \fooindfile to be the number of the output channel for
-% the file that	accumulates this index.  The file's extension is foo.
+% the file that accumulates this index.  The file's extension is foo.
 % The name of an index should be no more than 2 characters long
 % for the sake of vms.
 
 \def\newindex #1{
 \expandafter\newwrite \csname#1indfile\endcsname% Define number for output file
-\openout \csname#1indfile\endcsname \jobname.#1	% Open the file
-\expandafter\xdef\csname#1index\endcsname{%	% Define \xxxindex
+\openout \csname#1indfile\endcsname \jobname.#1 % Open the file
+\expandafter\xdef\csname#1index\endcsname{%     % Define \xxxindex
 \noexpand\doindex {#1}}
 }
 
@@ -1875,8 +2102,8 @@ July\or August\or September\or October\o
 
 \def\newcodeindex #1{
 \expandafter\newwrite \csname#1indfile\endcsname% Define number for output file
-\openout \csname#1indfile\endcsname \jobname.#1	% Open the file
-\expandafter\xdef\csname#1index\endcsname{%	% Define \xxxindex
+\openout \csname#1indfile\endcsname \jobname.#1 % Open the file
+\expandafter\xdef\csname#1index\endcsname{%     % Define \xxxindex
 \noexpand\docodeindex {#1}}
 }
 
@@ -1887,7 +2114,7 @@ July\or August\or September\or October\o
 \def\synindex #1 #2 {%
 \expandafter\let\expandafter\synindexfoo\expandafter=\csname#2indfile\endcsname
 \expandafter\let\csname#1indfile\endcsname=\synindexfoo
-\expandafter\xdef\csname#1index\endcsname{%	% Define \xxxindex
+\expandafter\xdef\csname#1index\endcsname{%     % Define \xxxindex
 \noexpand\doindex {#2}}%
 }
 
@@ -1896,7 +2123,7 @@ July\or August\or September\or October\o
 \def\syncodeindex #1 #2 {%
 \expandafter\let\expandafter\synindexfoo\expandafter=\csname#2indfile\endcsname
 \expandafter\let\csname#1indfile\endcsname=\synindexfoo
-\expandafter\xdef\csname#1index\endcsname{%	% Define \xxxindex
+\expandafter\xdef\csname#1index\endcsname{%     % Define \xxxindex
 \noexpand\docodeindex {#2}}%
 }
 
@@ -1944,24 +2171,31 @@ July\or August\or September\or October\o
 \def\L{\realbackslash L}%
 \def\ss{\realbackslash ss}%
 % Take care of texinfo commands likely to appear in an index entry.
+% (Must be a way to avoid doing expansion at all, and thus not have to
+% laboriously list every single command here.)
+\def\@{@}% will be @@ when we switch to @ as escape char.
+%\let\{ = \lbracecmd
+%\let\} = \rbracecmd
 \def\_{{\realbackslash _}}%
 \def\w{\realbackslash w }%
 \def\bf{\realbackslash bf }%
-\def\rm{\realbackslash rm }%
+%\def\rm{\realbackslash rm }%
 \def\sl{\realbackslash sl }%
 \def\sf{\realbackslash sf}%
 \def\tt{\realbackslash tt}%
 \def\gtr{\realbackslash gtr}%
 \def\less{\realbackslash less}%
 \def\hat{\realbackslash hat}%
-\def\char{\realbackslash char}%
+%\def\char{\realbackslash char}%
 \def\TeX{\realbackslash TeX}%
 \def\dots{\realbackslash dots }%
 \def\copyright{\realbackslash copyright }%
 \def\tclose##1{\realbackslash tclose {##1}}%
 \def\code##1{\realbackslash code {##1}}%
+\def\dotless##1{\realbackslash dotless {##1}}%
 \def\samp##1{\realbackslash samp {##1}}%
-\def\t##1{\realbackslash r {##1}}%
+\def\,##1{\realbackslash ,{##1}}%
+\def\t##1{\realbackslash t {##1}}%
 \def\r##1{\realbackslash r {##1}}%
 \def\i##1{\realbackslash i {##1}}%
 \def\b##1{\realbackslash b {##1}}%
@@ -1972,8 +2206,15 @@ July\or August\or September\or October\o
 \def\kbd##1{\realbackslash kbd {##1}}%
 \def\dfn##1{\realbackslash dfn {##1}}%
 \def\emph##1{\realbackslash emph {##1}}%
+\unsepspaces
 }
 
+% If an index command is used in an @example environment, any spaces
+% therein should become regular spaces in the raw index file, not the
+% expansion of \tie (\\leavevmode \penalty \@M \ ).
+{\obeyspaces
+ \gdef\unsepspaces{\obeyspaces\let =\space}}
+
 % \indexnofonts no-ops all font-change commands.
 % This is used when outputting the strings to sort the index by.
 \def\indexdummyfont#1{#1}
@@ -1982,6 +2223,7 @@ July\or August\or September\or October\o
 
 \def\indexnofonts{%
 % Just ignore accents.
+\let\,=\indexdummyfont
 \let\"=\indexdummyfont
 \let\`=\indexdummyfont
 \let\'=\indexdummyfont
@@ -1994,6 +2236,7 @@ July\or August\or September\or October\o
 \let\u=\indexdummyfont
 \let\v=\indexdummyfont
 \let\H=\indexdummyfont
+\let\dotless=\indexdummyfont
 % Take care of the plain tex special European modified letters.
 \def\oe{oe}%
 \def\ae{ae}%
@@ -2027,6 +2270,7 @@ July\or August\or September\or October\o
 \let\var=\indexdummyfont
 \let\TeX=\indexdummytex
 \let\dots=\indexdummydots
+\def\@{@}%
 }
 
 % To define \realbackslash, we must make \ not be an escape.
@@ -2042,29 +2286,37 @@ July\or August\or September\or October\o
 % workhorse for all \fooindexes
 % #1 is name of index, #2 is stuff to put there
 \def\doind #1#2{%
-% Put the index entry in the margin if desired.
-\ifx\SETmarginindex\relax\else%
-\insert\margin{\hbox{\vrule height8pt depth3pt width0pt #2}}%
-\fi%
-{\count10=\lastpenalty %
-{\indexdummies % Must do this here, since \bf, etc expand at this stage
-\escapechar=`\\%
-{\let\folio=0% Expand all macros now EXCEPT \folio
-\def\rawbackslashxx{\indexbackslash}% \indexbackslash isn't defined now
-% so it will be output as is; and it will print as backslash in the indx.
-%
-% Now process the index-string once, with all font commands turned off,
-% to get the string to sort the index by.
-{\indexnofonts
-\xdef\temp1{#2}%
-}%
-% Now produce the complete index entry.  We process the index-string again,
-% this time with font commands expanded, to get what to print in the index.
-\edef\temp{%
-\write \csname#1indfile\endcsname{%
-\realbackslash entry {\temp1}{\folio}{#2}}}%
-\temp }%
-}\penalty\count10}}
+  % Put the index entry in the margin if desired.
+  \ifx\SETmarginindex\relax\else
+    \insert\margin{\hbox{\vrule height8pt depth3pt width0pt #2}}%
+  \fi
+  {%
+    \count255=\lastpenalty
+    {%
+      \indexdummies % Must do this here, since \bf, etc expand at this stage
+      \escapechar=`\\
+      {%
+        \let\folio=0 % We will expand all macros now EXCEPT \folio.
+        \def\rawbackslashxx{\indexbackslash}% \indexbackslash isn't defined now
+        % so it will be output as is; and it will print as backslash.
+        %
+        % First process the index-string with all font commands turned off
+        % to get the string to sort by.
+        {\indexnofonts \xdef\indexsorttmp{#2}}%
+        %
+        % Now produce the complete index entry, with both the sort key and the
+        % original text, including any font commands.
+        \toks0 = {#2}%
+        \edef\temp{%
+          \write\csname#1indfile\endcsname{%
+            \realbackslash entry{\indexsorttmp}{\folio}{\the\toks0}}%
+        }%
+        \temp
+      }%
+    }%
+    \penalty\count255
+  }%
+}
 
 \def\dosubind #1#2#3{%
 {\count10=\lastpenalty %
@@ -2125,26 +2377,19 @@ July\or August\or September\or October\o
 
 \def\printindex{\parsearg\doprintindex}
 
-\def\doprintindex#1{%
-  \tex
-  \dobreak \chapheadingskip {10000}
-  \catcode`\%=\other\catcode`\&=\other\catcode`\#=\other
-  \catcode`\$=\other
-  \catcode`\~=\other
-  \indexbreaks
+\def\doprintindex#1{\begingroup
+  \dobreak \chapheadingskip{10000}%
   %
-  % The following don't help, since the chars were translated
-  % when the raw index was written, and their fonts were discarded
-  % due to \indexnofonts.
-  %\catcode`\"=\active
-  %\catcode`\^=\active
-  %\catcode`\_=\active
-  %\catcode`\|=\active
-  %\catcode`\<=\active
-  %\catcode`\>=\active
-  % %
-  \def\indexbackslash{\rawbackslashxx}
-  \indexfonts\rm \tolerance=9500 \advance\baselineskip -1pt
+  \indexfonts \rm
+  \tolerance = 9500
+  \indexbreaks
+  \def\indexbackslash{\rawbackslashxx}%
+  % Index files are almost Texinfo source, but we use \ as the escape
+  % character.  It would be better to use @, but that's too big a change
+  % to make right now.
+  \catcode`\\ = 0
+  \catcode`\@ = 11
+  \escapechar = `\\
   \begindoublecolumns
   %
   % See if the index file exists and is nonempty.
@@ -2155,7 +2400,7 @@ July\or August\or September\or October\o
     % index.  The easiest way to prevent this problem is to make sure
     % there is some text.
     (Index is nonexistent)
-    \else
+  \else
     %
     % If the index file exists but is empty, then \openin leaves \ifeof
     % false.  We have to make TeX try to read something from the file, so
@@ -2169,8 +2414,7 @@ July\or August\or September\or October\o
   \fi
   \closein 1
   \enddoublecolumns
-  \Etex
-}
+\endgroup}
 
 % These macros are used by the sorted index file itself.
 % Change them to control the appearance of the index.
@@ -2224,7 +2468,7 @@ July\or August\or September\or October\o
   %
   % Insert the text of the index entry.  TeX will do line-breaking on it.
   #1%
-  % The following is kluged to not output a line of dots in the index if
+  % The following is kludged to not output a line of dots in the index if
   % there are no page numbers.  The next person who breaks this will be
   % cursed by a Unix daemon.
   \def\tempa{{\rm }}%
@@ -2261,15 +2505,15 @@ July\or August\or September\or October\o
 \noindent\hskip\secondaryindent\hbox{#1}\indexdotfill #2\par
 }}
 
-%% Define two-column mode, which is used in indexes.
-%% Adapted from the TeXbook, page 416.
-\catcode `\@=11
+% Define two-column mode, which we use to typeset indexes.
+% Adapted from the TeXbook, page 416, which is to say,
+% the manmac.tex format used to print the TeXbook itself.
+\catcode`\@=11
 
 \newbox\partialpage
-
 \newdimen\doublecolumnhsize
 
-\def\begindoublecolumns{\begingroup
+\def\begindoublecolumns{\begingroup % ended by \enddoublecolumns
   % Grab any single-column material above us.
   \output = {\global\setbox\partialpage
     =\vbox{\unvbox255\kern -\topskip \kern \baselineskip}}%
@@ -2302,51 +2546,51 @@ July\or August\or September\or October\o
   % Double the \vsize as well.  (We don't need a separate register here,
   % since nobody clobbers \vsize.)
   \vsize = 2\vsize
-  \doublecolumnpagegoal
 }
-
-\def\enddoublecolumns{\eject \endgroup \pagegoal=\vsize \unvbox\partialpage}
-
-\def\doublecolumnsplit{\splittopskip=\topskip \splitmaxdepth=\maxdepth
-  \global\dimen@=\pageheight \global\advance\dimen@ by-\ht\partialpage
-  \global\setbox1=\vsplit255 to\dimen@ \global\setbox0=\vbox{\unvbox1}
-  \global\setbox3=\vsplit255 to\dimen@ \global\setbox2=\vbox{\unvbox3}
-  \ifdim\ht0>\dimen@ \setbox255=\vbox{\unvbox0\unvbox2} \global\setbox255=\copy5 \fi
-  \ifdim\ht2>\dimen@ \setbox255=\vbox{\unvbox0\unvbox2} \global\setbox255=\copy5 \fi
-}
-\def\doublecolumnpagegoal{%
-  \dimen@=\vsize \advance\dimen@ by-2\ht\partialpage \global\pagegoal=\dimen@
-}
-\def\pagesofar{\unvbox\partialpage %
-  \hsize=\doublecolumnhsize % have to restore this since output routine
-  \wd0=\hsize \wd2=\hsize \hbox to\pagewidth{\box0\hfil\box2}}
 \def\doublecolumnout{%
-  \setbox5=\copy255
-  {\vbadness=10000 \doublecolumnsplit}
-  \ifvbox255
-    \setbox0=\vtop to\dimen@{\unvbox0}
-    \setbox2=\vtop to\dimen@{\unvbox2}
-    \onepageout\pagesofar \unvbox255 \penalty\outputpenalty
-  \else
-    \setbox0=\vbox{\unvbox5}
-    \ifvbox0
-      \dimen@=\ht0 \advance\dimen@ by\topskip \advance\dimen@ by-\baselineskip
-      \divide\dimen@ by2 \splittopskip=\topskip \splitmaxdepth=\maxdepth
-      {\vbadness=10000
-	\loop \global\setbox5=\copy0
-          \setbox1=\vsplit5 to\dimen@
-          \setbox3=\vsplit5 to\dimen@
-          \ifvbox5 \global\advance\dimen@ by1pt \repeat
-        \setbox0=\vbox to\dimen@{\unvbox1}
-        \setbox2=\vbox to\dimen@{\unvbox3}
-        \global\setbox\partialpage=\vbox{\pagesofar}
-        \doublecolumnpagegoal
-      }
-    \fi
-  \fi
+  \splittopskip=\topskip \splitmaxdepth=\maxdepth
+  % Get the available space for the double columns -- the normal
+  % (undoubled) page height minus any material left over from the
+  % previous page.
+  \dimen@=\pageheight \advance\dimen@ by-\ht\partialpage
+  % box0 will be the left-hand column, box1 the right.
+  \setbox0=\vsplit255 to\dimen@ \setbox2=\vsplit255 to\dimen@
+  \onepageout\pagesofar
+  \unvbox255 \penalty\outputpenalty
+}
+\def\pagesofar{%
+  % The contents of the output page -- any previous material,
+  % followed by the two boxes we just split.
+  \unvbox\partialpage
+  \hsize = \doublecolumnhsize
+  \wd0=\hsize \wd2=\hsize \hbox to\pagewidth{\box0\hfil\box2}%
+}
+\def\enddoublecolumns{%
+  \output={\balancecolumns}\eject % split what we have
+  \endgroup
+  % Back to normal single-column typesetting, but take account of the
+  % fact that we just accumulated some stuff on the output page.
+  \pagegoal=\vsize 
+}
+\def\balancecolumns{%
+  % Called on the last page of the double column material.
+  \setbox0=\vbox{\unvbox255}%
+  \dimen@ = \ht0
+  \advance\dimen@ by \topskip
+  \advance\dimen@ by-\baselineskip
+  \divide\dimen@ by 2
+  \splittopskip = \topskip
+  % Loop until we get a decent breakpoint.
+  {\vbadness=10000 \loop \global\setbox3=\copy0
+    \global\setbox1=\vsplit3 to\dimen@
+    \ifdim\ht3>\dimen@ \global\advance\dimen@ by1pt \repeat}%
+  \setbox0=\vbox to\dimen@{\unvbox1}%
+  \setbox2=\vbox to\dimen@{\unvbox3}%
+  \pagesofar
 }
-
 \catcode `\@=\other
+
+
 \message{sectioning,}
 % Define chapters, sections, etc.
 
@@ -2518,6 +2762,10 @@ July\or August\or September\or October\o
 \global\let\subsubsection = \appendixsubsubsec
 }}
 
+% @centerchap is like @unnumbered, but the heading is centered.
+\outer\def\centerchap{\parsearg\centerchapyyy}
+\def\centerchapyyy #1{{\let\unnumbchapmacro=\centerchapmacro \unnumberedyyy{#1}}}
+
 \outer\def\top{\parsearg\unnumberedyyy}
 \outer\def\unnumbered{\parsearg\unnumberedyyy}
 \def\unnumberedyyy #1{\unnmhead0{#1}} % normally unnmhead0 calls unnumberedzzz
@@ -2562,7 +2810,7 @@ July\or August\or September\or October\o
 \penalty 10000 %
 }}
 
-\outer\def\appenixsection{\parsearg\appendixsecyyy}
+\outer\def\appendixsection{\parsearg\appendixsecyyy}
 \outer\def\appendixsec{\parsearg\appendixsecyyy}
 \def\appendixsecyyy #1{\apphead1{#1}} % normally calls appendixsectionzzz
 \def\appendixsectionzzz #1{\seccheck{appendixsection}%
@@ -2620,7 +2868,7 @@ July\or August\or September\or October\o
 \outer\def\unnumberedsubsec{\parsearg\unnumberedsubsecyyy}
 \def\unnumberedsubsecyyy #1{\unnmhead2{#1}} %normally calls unnumberedsubseczzz
 \def\unnumberedsubseczzz #1{\seccheck{unnumberedsubsec}%
-\plainsecheading {#1}\gdef\thissection{#1}%
+\plainsubsecheading {#1}\gdef\thissection{#1}%
 {\chapternofonts%
 \edef\temp{{\realbackslash unnumbsubsecentry{#1}{\noexpand\folio}}}%
 \escapechar=`\\%
@@ -2665,7 +2913,7 @@ July\or August\or September\or October\o
 \outer\def\unnumberedsubsubsec{\parsearg\unnumberedsubsubsecyyy}
 \def\unnumberedsubsubsecyyy #1{\unnmhead3{#1}} %normally unnumberedsubsubseczzz
 \def\unnumberedsubsubseczzz #1{\seccheck{unnumberedsubsubsec}%
-\plainsecheading {#1}\gdef\thissection{#1}%
+\plainsubsubsecheading {#1}\gdef\thissection{#1}%
 {\chapternofonts%
 \edef\temp{{\realbackslash unnumbsubsubsecentry{#1}{\noexpand\folio}}}%
 \escapechar=`\\%
@@ -2703,10 +2951,10 @@ July\or August\or September\or October\o
 
 % NOTE on use of \vbox for chapter headings, section headings, and
 % such:
-%	1) We use \vbox rather than the earlier \line to permit
-%	   overlong headings to fold.
-%	2) \hyphenpenalty is set to 10000 because hyphenation in a
-%	   heading is obnoxious; this forbids it.
+%       1) We use \vbox rather than the earlier \line to permit
+%          overlong headings to fold.
+%       2) \hyphenpenalty is set to 10000 because hyphenation in a
+%          heading is obnoxious; this forbids it.
 %       3) Likewise, headings look best if no \parindent is used, and
 %          if justification is not attempted.  Hence \raggedright.
 
@@ -2724,11 +2972,10 @@ July\or August\or September\or October\o
                   \parindent=0pt\raggedright
                   \rm #1\hfill}}\bigskip \par\penalty 200}
 
-\def\heading{\parsearg\secheadingi}
-
-\def\subheading{\parsearg\subsecheadingi}
-
-\def\subsubheading{\parsearg\subsubsecheadingi}
+% @heading, @subheading, @subsubheading.
+\def\heading{\parsearg\plainsecheading}
+\def\subheading{\parsearg\plainsubsecheading}
+\def\subsubheading{\parsearg\plainsubsubsecheading}
 
 % These macros generate a chapter, section, etc. heading only
 % (including whitespace, linebreaking, etc. around it),
@@ -2742,7 +2989,7 @@ July\or August\or September\or October\o
 %%% Define plain chapter starts, and page on/off switching for it
 % Parameter controlling skip before chapter headings (if needed)
 
-\newskip \chapheadingskip \chapheadingskip = 30pt plus 8pt minus 4pt
+\newskip\chapheadingskip
 
 \def\chapbreak{\dobreak \chapheadingskip {-4000}}
 \def\chappager{\par\vfill\supereject}
@@ -2751,15 +2998,18 @@ July\or August\or September\or October\o
 \def\setchapternewpage #1 {\csname CHAPPAG#1\endcsname}
 
 \def\CHAPPAGoff{
+\global\let\contentsalignmacro = \chappager
 \global\let\pchapsepmacro=\chapbreak
 \global\let\pagealignmacro=\chappager}
 
 \def\CHAPPAGon{
+\global\let\contentsalignmacro = \chappager
 \global\let\pchapsepmacro=\chappager
 \global\let\pagealignmacro=\chappager
 \global\def\HEADINGSon{\HEADINGSsingle}}
 
 \def\CHAPPAGodd{
+\global\let\contentsalignmacro = \chapoddpage
 \global\let\pchapsepmacro=\chapoddpage
 \global\let\pagealignmacro=\chapoddpage
 \global\def\HEADINGSon{\HEADINGSdouble}}
@@ -2768,25 +3018,39 @@ July\or August\or September\or October\o
 
 \def\CHAPFplain{
 \global\let\chapmacro=\chfplain
-\global\let\unnumbchapmacro=\unnchfplain}
+\global\let\unnumbchapmacro=\unnchfplain
+\global\let\centerchapmacro=\centerchfplain}
 
-\def\chfplain #1#2{%
+% Plain chapter opening.
+% #1 is the text, #2 the chapter number or empty if unnumbered.
+\def\chfplain#1#2{%
   \pchapsepmacro
   {%
-    \chapfonts \vbox{\hyphenpenalty=10000\tolerance=5000
-                     \parindent=0pt\raggedright
-                     \rm #2\enspace #1}%
+    \chapfonts \rm
+    \def\chapnum{#2}%
+    \setbox0 = \hbox{#2\ifx\chapnum\empty\else\enspace\fi}%
+    \vbox{\hyphenpenalty=10000 \tolerance=5000 \parindent=0pt \raggedright
+          \hangindent = \wd0 \centerparametersmaybe
+          \unhbox0 #1\par}%
   }%
-  \bigskip
-  \penalty5000
+  \nobreak\bigskip % no page break after a chapter title
+  \nobreak
 }
 
-\def\unnchfplain #1{%
-\pchapsepmacro %
-{\chapfonts \vbox{\hyphenpenalty=10000\tolerance=5000
-                  \parindent=0pt\raggedright
-                  \rm #1\hfill}}\bigskip \par\penalty 10000 %
-}
+% Plain opening for unnumbered.
+\def\unnchfplain#1{\chfplain{#1}{}}
+
+% @centerchap -- centered and unnumbered.
+\let\centerparametersmaybe = \relax
+\def\centerchfplain#1{{%
+  \def\centerparametersmaybe{%
+    \advance\rightskip by 3\rightskip
+    \leftskip = \rightskip
+    \parfillskip = 0pt
+  }%
+  \chfplain{#1}{}%
+}}
+
 \CHAPFplain % The default
 
 \def\unnchfopen #1{%
@@ -2800,73 +3064,81 @@ July\or August\or September\or October\o
 \par\penalty 5000 %
 }
 
+\def\centerchfopen #1{%
+\chapoddpage {\chapfonts \vbox{\hyphenpenalty=10000\tolerance=5000
+                       \parindent=0pt
+                       \hfill {\rm #1}\hfill}}\bigskip \par\penalty 10000 %
+}
+
 \def\CHAPFopen{
 \global\let\chapmacro=\chfopen
-\global\let\unnumbchapmacro=\unnchfopen}
+\global\let\unnumbchapmacro=\unnchfopen
+\global\let\centerchapmacro=\centerchfopen}
 
-% Parameter controlling skip before section headings.
 
-\newskip \subsecheadingskip  \subsecheadingskip = 17pt plus 8pt minus 4pt
-\def\subsecheadingbreak{\dobreak \subsecheadingskip {-500}}
-
-\newskip \secheadingskip  \secheadingskip = 21pt plus 8pt minus 4pt
+% Section titles.
+\newskip\secheadingskip
 \def\secheadingbreak{\dobreak \secheadingskip {-1000}}
+\def\secheading#1#2#3{\sectionheading{sec}{#2.#3}{#1}}
+\def\plainsecheading#1{\sectionheading{sec}{}{#1}}
 
-% @paragraphindent  is defined for the Info formatting commands only.
-\let\paragraphindent=\comment
+% Subsection titles.
+\newskip \subsecheadingskip
+\def\subsecheadingbreak{\dobreak \subsecheadingskip {-500}}
+\def\subsecheading#1#2#3#4{\sectionheading{subsec}{#2.#3.#4}{#1}}
+\def\plainsubsecheading#1{\sectionheading{subsec}{}{#1}}
 
-% Section fonts are the base font at magstep2, which produces
-% a size a bit more than 14 points in the default situation.
+% Subsubsection titles.
+\let\subsubsecheadingskip = \subsecheadingskip
+\let\subsubsecheadingbreak = \subsecheadingbreak
+\def\subsubsecheading#1#2#3#4#5{\sectionheading{subsubsec}{#2.#3.#4.#5}{#1}}
+\def\plainsubsubsecheading#1{\sectionheading{subsubsec}{}{#1}}
 
-\def\secheading #1#2#3{\secheadingi {#2.#3\enspace #1}}
-\def\plainsecheading #1{\secheadingi {#1}}
-\def\secheadingi #1{{\advance \secheadingskip by \parskip %
-\secheadingbreak}%
-{\secfonts \vbox{\hyphenpenalty=10000\tolerance=5000
-                 \parindent=0pt\raggedright
-                 \rm #1\hfill}}%
-\ifdim \parskip<10pt \kern 10pt\kern -\parskip\fi \penalty 10000 }
-
-
-% Subsection fonts are the base font at magstep1,
-% which produces a size of 12 points.
-
-\def\subsecheading #1#2#3#4{\subsecheadingi {#2.#3.#4\enspace #1}}
-\def\subsecheadingi #1{{\advance \subsecheadingskip by \parskip %
-\subsecheadingbreak}%
-{\subsecfonts \vbox{\hyphenpenalty=10000\tolerance=5000
-                     \parindent=0pt\raggedright
-                     \rm #1\hfill}}%
-\ifdim \parskip<10pt \kern 10pt\kern -\parskip\fi \penalty 10000 }
-
-\def\subsubsecfonts{\subsecfonts} % Maybe this should change:
-				  % Perhaps make sssec fonts scaled
-				  % magstep half
-\def\subsubsecheading #1#2#3#4#5{\subsubsecheadingi {#2.#3.#4.#5\enspace #1}}
-\def\subsubsecheadingi #1{{\advance \subsecheadingskip by \parskip %
-\subsecheadingbreak}%
-{\subsubsecfonts \vbox{\hyphenpenalty=10000\tolerance=5000
-                       \parindent=0pt\raggedright
-                       \rm #1\hfill}}%
-\ifdim \parskip<10pt \kern 10pt\kern -\parskip\fi \penalty 10000}
 
+% Print any size section title.
+% 
+% #1 is the section type (sec/subsec/subsubsec), #2 is the section
+% number (maybe empty), #3 the text.
+\def\sectionheading#1#2#3{%
+  {%
+    \expandafter\advance\csname #1headingskip\endcsname by \parskip
+    \csname #1headingbreak\endcsname
+  }%
+  {%
+    % Switch to the right set of fonts.
+    \csname #1fonts\endcsname \rm
+    %
+    % Only insert the separating space if we have a section number.
+    \def\secnum{#2}%
+    \setbox0 = \hbox{#2\ifx\secnum\empty\else\enspace\fi}%
+    %
+    \vbox{\hyphenpenalty=10000 \tolerance=5000 \parindent=0pt \raggedright
+          \hangindent = \wd0 % zero if no section number
+          \unhbox0 #3}%
+  }%
+  \ifdim\parskip<10pt \nobreak\kern10pt\nobreak\kern-\parskip\fi \nobreak
+}
 
-\message{toc printing,}
 
+\message{toc printing,}
 % Finish up the main text and prepare to read what we've written
 % to \contentsfile.
 
 \newskip\contentsrightmargin \contentsrightmargin=1in
 \def\startcontents#1{%
-   \pagealignmacro
+   % If @setchapternewpage on, and @headings double, the contents should
+   % start on an odd page, unlike chapters.  Thus, we maintain
+   % \contentsalignmacro in parallel with \pagealignmacro.
+   % From: Torbjorn Granlund <tege@matematik.su.se>
+   \contentsalignmacro
    \immediate\closeout \contentsfile
    \ifnum \pageno>0
-      \pageno = -1		% Request roman numbered pages.
+      \pageno = -1              % Request roman numbered pages.
    \fi
    % Don't need to put `Contents' or `Short Contents' in the headline.
    % It is abundantly clear what they are.
    \unnumbchapmacro{#1}\def\thischapter{}%
-   \begingroup   		% Set up to handle contents files properly.
+   \begingroup                  % Set up to handle contents files properly.
       \catcode`\\=0  \catcode`\{=1  \catcode`\}=2  \catcode`\@=11
       \catcode`\^=7 % to see ^^e4 as \"a etc. juha@piuha.ydi.vtt.fi
       \raggedbottom             % Worry more about breakpoints than the bottom.
@@ -2892,6 +3164,7 @@ July\or August\or September\or October\o
       \secfonts
       \let\rm=\shortcontrm \let\bf=\shortcontbf \let\sl=\shortcontsl
       \rm
+      \hyphenpenalty = 10000
       \advance\baselineskip by 1pt % Open it up a little.
       \def\secentry ##1##2##3##4{}
       \def\unnumbsecentry ##1##2{}
@@ -2935,7 +3208,7 @@ July\or August\or September\or October\o
   % This space should be plenty, since a single number is .5em, and the
   % widest letter (M) is 1em, at least in the Computer Modern fonts.
   % (This space doesn't include the extra space that gets added after
-  % the label; that gets put in in \shortchapentry above.)
+  % the label; that gets put in by \shortchapentry above.)
   \advance\dimen0 by 1.1em
   \hbox to \dimen0{#1\hfil}%
 }
@@ -2956,22 +3229,21 @@ July\or August\or September\or October\o
   \dosubsubsecentry{#2.#3.#4.#5\labelspace#1}{#6}}
 \def\unnumbsubsubsecentry#1#2{\dosubsubsecentry{#1}{#2}}
 
-
 % This parameter controls the indentation of the various levels.
 \newdimen\tocindent \tocindent = 3pc
 
 % Now for the actual typesetting. In all these, #1 is the text and #2 is the
 % page number.
 %
-% If the toc has to be broken over pages, we would want to be at chapters
+% If the toc has to be broken over pages, we want it to be at chapters
 % if at all possible; hence the \penalty.
 \def\dochapentry#1#2{%
-   \penalty-300 \vskip\baselineskip
+   \penalty-300 \vskip1\baselineskip plus.33\baselineskip minus.25\baselineskip
    \begingroup
      \chapentryfonts
      \tocentry{#1}{\dopageno{#2}}%
    \endgroup
-   \nobreak\vskip .25\baselineskip
+   \nobreak\vskip .25\baselineskip plus.1\baselineskip
 }
 
 \def\dosecentry#1#2{\begingroup
@@ -2994,9 +3266,10 @@ July\or August\or September\or October\o
 % can't do that in the \entry macro, since index entries might consist
 % of hyphenated-identifiers-that-do-not-fit-on-a-line-and-nothing-else.)
 %
+% \turnoffactive is for the sake of @" used for umlauts.
 \def\tocentry#1#2{\begingroup
-  \hyphenpenalty = 10000
-  \entry{#1}{#2}%
+  \vskip 0pt plus1pt % allow a little stretch for the sake of nice page breaks
+  \entry{\turnoffactive #1}{\turnoffactive #2}%
 \endgroup}
 
 % Space between chapter (or whatever) number and the title.
@@ -3020,8 +3293,6 @@ July\or August\or September\or October\o
 \newbox\pushcharbox    \newbox\bullbox
 \newbox\equivbox       \newbox\errorbox
 
-\let\ptexequiv = \equiv
-
 %{\tentt
 %\global\setbox\dblarrowbox = \hbox to 1em{\hfil$\Rightarrow$\hfil}
 %\global\setbox\longdblarrowbox = \hbox to 1em{\hfil$\mapsto$\hfil}
@@ -3032,12 +3303,11 @@ July\or August\or September\or October\o
 %                                      depth .1ex\hfil}
 %}
 
+% @point{}, @result{}, @expansion{}, @print{}, @equiv{}.
 \def\point{$\star$}
-
 \def\result{\leavevmode\raise.15ex\hbox to 1em{\hfil$\Rightarrow$\hfil}}
 \def\expansion{\leavevmode\raise.1ex\hbox to 1em{\hfil$\mapsto$\hfil}}
 \def\print{\leavevmode\lower.1ex\hbox to 1em{\hfil$\dashv$\hfil}}
-
 \def\equiv{\leavevmode\lower.1ex\hbox to 1em{\hfil$\ptexequiv$\hfil}}
 
 % Adapted from the TeXbook's \boxit.
@@ -3069,7 +3339,7 @@ July\or August\or September\or October\o
 \catcode `\$=3 \catcode `\&=4 \catcode `\#=6
 \catcode `\^=7 \catcode `\_=8 \catcode `\~=13 \let~=\tie
 \catcode `\%=14
-\catcode 43=12
+\catcode 43=12 % plus
 \catcode`\"=12
 \catcode`\==12
 \catcode`\|=12
@@ -3077,16 +3347,18 @@ July\or August\or September\or October\o
 \catcode`\>=12
 \escapechar=`\\
 %
+\let\,=\ptexcomma
 \let\~=\ptextilde
 \let\{=\ptexlbrace
 \let\}=\ptexrbrace
 \let\.=\ptexdot
 \let\*=\ptexstar
 \let\dots=\ptexdots
+\def\endldots{\mathinner{\ldots\ldots\ldots\ldots}}
+\def\enddots{\relax\ifmmode\endldots\else$\mathsurround=0pt \endldots\,$\fi}
 \def\@{@}%
 \let\bullet=\ptexbullet
-\let\b=\ptexb \let\c=\ptexc \let\i=\ptexi \let\t=\ptext \let\l=\ptexl
-\let\L=\ptexL
+\let\b=\ptexb \let\c=\ptexc \let\i=\ptexi \let\t=\ptext
 %
 \let\Etex=\endgroup}
 
@@ -3145,50 +3417,50 @@ July\or August\or September\or October\o
 \def\cbl{{\circle\char'012\hskip -6pt}}
 \def\cbr{{\hskip 6pt\circle\char'011}}
 \def\carttop{\hbox to \cartouter{\hskip\lskip
-	\ctl\leaders\hrule height\circthick\hfil\ctr
-	\hskip\rskip}}
+        \ctl\leaders\hrule height\circthick\hfil\ctr
+        \hskip\rskip}}
 \def\cartbot{\hbox to \cartouter{\hskip\lskip
-	\cbl\leaders\hrule height\circthick\hfil\cbr
-	\hskip\rskip}}
+        \cbl\leaders\hrule height\circthick\hfil\cbr
+        \hskip\rskip}}
 %
 \newskip\lskip\newskip\rskip
 
 \long\def\cartouche{%
 \begingroup
-	\lskip=\leftskip \rskip=\rightskip
-	\leftskip=0pt\rightskip=0pt %we want these *outside*.
-	\cartinner=\hsize \advance\cartinner by-\lskip
-		 	  \advance\cartinner by-\rskip
-	\cartouter=\hsize
-	\advance\cartouter by 18pt % allow for 3pt kerns on either
-%				     side, and for 6pt waste from
-%				     each corner char
-	\normbskip=\baselineskip \normpskip=\parskip \normlskip=\lineskip
-	% Flag to tell @lisp, etc., not to narrow margin.
-	\let\nonarrowing=\comment
-	\vbox\bgroup
-		\baselineskip=0pt\parskip=0pt\lineskip=0pt
-		\carttop
-		\hbox\bgroup
-			\hskip\lskip
-			\vrule\kern3pt
-			\vbox\bgroup
-				\hsize=\cartinner
-				\kern3pt
-				\begingroup
-					\baselineskip=\normbskip
-					\lineskip=\normlskip
-					\parskip=\normpskip
-					\vskip -\parskip
+        \lskip=\leftskip \rskip=\rightskip
+        \leftskip=0pt\rightskip=0pt %we want these *outside*.
+        \cartinner=\hsize \advance\cartinner by-\lskip
+                          \advance\cartinner by-\rskip
+        \cartouter=\hsize
+        \advance\cartouter by 18pt % allow for 3pt kerns on either
+%                                    side, and for 6pt waste from
+%                                    each corner char
+        \normbskip=\baselineskip \normpskip=\parskip \normlskip=\lineskip
+        % Flag to tell @lisp, etc., not to narrow margin.
+        \let\nonarrowing=\comment
+        \vbox\bgroup
+                \baselineskip=0pt\parskip=0pt\lineskip=0pt
+                \carttop
+                \hbox\bgroup
+                        \hskip\lskip
+                        \vrule\kern3pt
+                        \vbox\bgroup
+                                \hsize=\cartinner
+                                \kern3pt
+                                \begingroup
+                                        \baselineskip=\normbskip
+                                        \lineskip=\normlskip
+                                        \parskip=\normpskip
+                                        \vskip -\parskip
 \def\Ecartouche{%
-				\endgroup
-				\kern3pt
-			\egroup
-			\kern3pt\vrule
-			\hskip\rskip
-		\egroup
-		\cartbot
-	\egroup
+                                \endgroup
+                                \kern3pt
+                        \egroup
+                        \kern3pt\vrule
+                        \hskip\rskip
+                \egroup
+                \cartbot
+        \egroup
 \endgroup
 }}
 
@@ -3251,8 +3523,7 @@ July\or August\or September\or October\o
   \let\Esmalllisp = \nonfillfinish
   \let\Esmallexample = \nonfillfinish
   %
-  % Smaller interline space and fonts for small examples.
-  \setleading{10pt}%
+  % Smaller fonts for small examples.
   \indexfonts \tt
   \rawbackslash % make \ output the \ character from the current font (tt)
   \gobble
@@ -3341,6 +3612,9 @@ July\or August\or September\or October\o
 
 \gdef\functionparens{\boldbrax\let&=\amprm\parencount=0 }
 \gdef\boldbrax{\let(=\opnr\let)=\clnr\let[=\lbrb\let]=\rbrb}
+% This is used to turn on special parens
+% but make & act ordinary (given that it's active).
+\gdef\boldbraxnoamp{\let(=\opnr\let)=\clnr\let[=\lbrb\let]=\rbrb\let&=\ampnr}
 
 % Definitions of (, ) and & used in args for functions.
 % This is the definition of ( outside of all parentheses.
@@ -3549,7 +3823,8 @@ July\or August\or September\or October\o
 \def\deftypefunargs #1{%
 % Expand, preventing hyphenation at `-' chars.
 % Note that groups don't affect changes in \hyphenchar.
-\functionparens
+% Use \boldbraxnoamp, not \functionparens, so that & is not special.
+\boldbraxnoamp
 \tclose{#1}% avoid \code because of side effects on active chars
 \interlinepenalty=10000
 \advance\rightskip by 0pt plus 1fil
@@ -3776,6 +4051,7 @@ July\or August\or September\or October\o
 
 \def\deftpx #1 {\errmessage{@deftpx in invalid context}}
 
+
 \message{cross reference,}
 % Define cross-reference macros
 \newwrite \auxfile
@@ -3783,6 +4059,11 @@ July\or August\or September\or October\o
 \newif\ifhavexrefs  % True if xref values are known.
 \newif\ifwarnedxrefs  % True if we warned once that they aren't known.
 
+% @inforef is simple.
+\def\inforef #1{\inforefzzz #1,,,,**}
+\def\inforefzzz #1,#2,#3,#4**{\putwordSee{} \putwordInfo{} \putwordfile{} \file{\ignorespaces #3{}},
+  node \samp{\ignorespaces#1{}}}
+
 % \setref{foo} defines a cross-reference point named foo.
 
 \def\setref#1{%
@@ -3816,7 +4097,10 @@ July\or August\or September\or October\o
   \setbox0=\hbox{\printednodename}%
   \ifdim \wd0 = 0pt
     % No printed node name was explicitly given.
-    \ifx\SETxref-automatic-section-title\relax %
+    \expandafter\ifx\csname SETxref-automatic-section-title\endcsname\relax
+      % Use the node name inside the square brackets.
+      \def\printednodename{\ignorespaces #1}%
+    \else
       % Use the actual chapter/section title appear inside
       % the square brackets.  Use the real section title if we have it.
       \ifdim \wd1>0pt%
@@ -3825,16 +4109,12 @@ July\or August\or September\or October\o
       \else
         \ifhavexrefs
           % We know the real title if we have the xref values.
-          \def\printednodename{\refx{#1-title}}%
+          \def\printednodename{\refx{#1-title}{}}%
         \else
           % Otherwise just copy the Info node name.
           \def\printednodename{\ignorespaces #1}%
         \fi%
       \fi
-      \def\printednodename{#1-title}%
-    \else
-      % Use the node name inside the square brackets.
-      \def\printednodename{\ignorespaces #1}%
     \fi
   \fi
   %
@@ -4019,7 +4299,8 @@ July\or August\or September\or October\o
 % The trailing space in the following definition for supereject is
 % vital for proper filling; pages come out unaligned when you do a
 % pagealignmacro call if that space before the closing brace is
-% removed.
+% removed. (Generally, numeric constants should always be followed by a
+% space to prevent strange expansion errors.)
 \def\supereject{\par\penalty -20000\footnoteno =0 }
 
 % @footnotestyle is meaningful for info output only..
@@ -4144,13 +4425,18 @@ July\or August\or September\or October\o
 
 % Set some numeric style parameters, for 8.5 x 11 format.
 
-%\hsize = 6.5in
+\hsize = 6in
+\hoffset = .25in
 \newdimen\defaultparindent \defaultparindent = 15pt
 \parindent = \defaultparindent
-\parskip 18pt plus 1pt
-\setleading{15pt}
+\parskip 3pt plus 2pt minus 1pt
+\setleading{13.2pt}
 \advance\topskip by 1.2cm
 
+\chapheadingskip = 15pt plus 4pt minus 2pt
+\secheadingskip = 12pt plus 3pt minus 2pt
+\subsecheadingskip = 9pt plus 2pt minus 2pt
+
 % Prevent underfull vbox error messages.
 \vbadness=10000
 
@@ -4173,30 +4459,28 @@ July\or August\or September\or October\o
 
 % Use @smallbook to reset parameters for 7x9.5 format  (or else 7x9.25)
 \def\smallbook{
-
-% These values for secheadingskip and subsecheadingskip are
-% experiments.  RJC 7 Aug 1992
-\global\secheadingskip = 17pt plus 6pt minus 3pt
-\global\subsecheadingskip = 14pt plus 6pt minus 3pt
-
-\global\lispnarrowing = 0.3in
-\setleading{12pt}
-\advance\topskip by -1cm
-\global\parskip 3pt plus 1pt
-\global\hsize = 5in
-\global\vsize=7.5in
-\global\tolerance=700
-\global\hfuzz=1pt
-\global\contentsrightmargin=0pt
-\global\deftypemargin=0pt
-\global\defbodyindent=.5cm
-
-\global\pagewidth=\hsize
-\global\pageheight=\vsize
-
-\global\let\smalllisp=\smalllispx
-\global\let\smallexample=\smalllispx
-\global\def\Esmallexample{\Esmalllisp}
+  \global\chapheadingskip = 15pt plus 4pt minus 2pt
+  \global\secheadingskip = 12pt plus 3pt minus 2pt
+  \global\subsecheadingskip = 9pt plus 2pt minus 2pt
+  %
+  \global\lispnarrowing = 0.3in
+  \setleading{12pt}
+  \advance\topskip by -1cm
+  \global\parskip 2pt plus 1pt
+  \global\hsize = 5in
+  \global\vsize=7.5in
+  \global\tolerance=700
+  \global\hfuzz=1pt
+  \global\contentsrightmargin=0pt
+  \global\deftypemargin=0pt
+  \global\defbodyindent=.5cm
+  %
+  \global\pagewidth=\hsize
+  \global\pageheight=\vsize
+  %
+  \global\let\smalllisp=\smalllispx
+  \global\let\smallexample=\smalllispx
+  \global\def\Esmallexample{\Esmalllisp}
 }
 
 % Use @afourpaper to print on European A4 paper.
@@ -4219,12 +4503,19 @@ July\or August\or September\or October\o
 \global\pageheight=\vsize
 }
 
+\bindingoffset=0pt
+\normaloffset=\hoffset
+\pagewidth=\hsize
+\pageheight=\vsize
+
 % Allow control of the text dimensions.  Parameters in order: textheight;
-% textwidth; \voffset; \hoffset (!); binding offset.  All require a dimension;
+% textwidth; voffset; hoffset; binding offset; topskip.
+% All require a dimension;
 % header is additional; added length extends the bottom of the page.
 
-\def\changepagesizes#1#2#3#4#5{
+\def\changepagesizes#1#2#3#4#5#6{
  \global\vsize= #1
+ \global\topskip= #6
  \advance\vsize by \topskip
  \global\voffset= #3
  \global\hsize= #2
@@ -4237,9 +4528,20 @@ July\or August\or September\or October\o
  \global\normaloffset= #4
  \global\bindingoffset= #5}
 
-% This layout is compatible with Latex on A4 paper.
-
-\def\afourlatex{\changepagesizes{22cm}{15cm}{7mm}{4.6mm}{5mm}}
+% A specific text layout, 24x15cm overall, intended for A4 paper.  Top margin
+% 29mm, hence bottom margin 28mm, nominal side margin 3cm.
+\def\afourlatex
+        {\global\tolerance=700
+        \global\hfuzz=1pt
+        \setleading{12pt}
+        \global\parskip 15pt plus 1pt
+        \advance\baselineskip by 1.6pt
+        \changepagesizes{237mm}{150mm}{3.6mm}{3.6mm}{3mm}{7mm}
+        }
+
+% Use @afourwide to print on European A4 paper in wide format.
+\def\afourwide{\afourpaper
+\changepagesizes{9.5in}{6.5in}{\hoffset}{\normaloffset}{\bindingoffset}{7mm}}
 
 % Define macros to output various characters with catcode for normal text.
 \catcode`\"=\other
@@ -4288,14 +4590,7 @@ July\or August\or September\or October\o
 \catcode`\_=\active
 \def_{\ifusingtt\normalunderscore\_}
 % Subroutine for the previous macro.
-\def\_{\lvvmode \kern.06em \vbox{\hrule width.3em height.1ex}}
-
-% \lvvmode is equivalent in function to \leavevmode.
-% Using \leavevmode runs into trouble when written out to
-% an index file due to the expansion of \leavevmode into ``\unhbox
-% \voidb@x'' ---which looks to TeX like ``\unhbox \voidb\x'' due to our
-% magic tricks with @.
-\def\lvvmode{\vbox to 0pt{}}
+\def\_{\leavevmode \kern.06em \vbox{\hrule width.3em height.1ex}}
 
 \catcode`\|=\active
 \def|{{\tt \char '174}}
@@ -4314,6 +4609,15 @@ July\or August\or September\or October\o
 {\catcode`\==\active
 \global\def={{\tt \char 61}}}
 
+\catcode`+=\active
+\catcode`\_=\active
+
+% If a .fmt file is being used, characters that might appear in a file
+% name cannot be active until we have parsed the command line.
+% So turn them off again, and have \everyjob (or @setfilename) turn them on.
+% \otherifyactive is called near the end of this file.
+\def\otherifyactive{\catcode`+=\other \catcode`\_=\other}
+
 \catcode`\@=0
 
 % \rawbackslashxx output one backslash character in current font
@@ -4356,6 +4660,10 @@ July\or August\or September\or October\o
 @let>=@normalgreater
 @let+=@normalplus}
 
+% Make _ and + \other characters, temporarily.
+% This is canceled by @fixbackslash.
+@otherifyactive
+
 % If a .fmt file is being used, we don't want the `\input texinfo' to show up.
 % That is what \eatinput is for; after that, the `\' should revert to printing
 % a backslash.
@@ -4366,8 +4674,11 @@ July\or August\or September\or October\o
 % On the other hand, perhaps the file did not have a `\input texinfo'. Then
 % the first `\{ in the file would cause an error. This macro tries to fix
 % that, assuming it is called before the first `\' could plausibly occur.
+% Also back turn on active characters that might appear in the input
+% file name, in case not using a pre-dumped format.
 %
-@gdef@fixbackslash{@ifx\@eatinput @let\ = @normalbackslash @fi}
+@gdef@fixbackslash{@ifx\@eatinput @let\ = @normalbackslash @fi
+  @catcode`+=@active @catcode`@_=@active}
 
 %% These look ok in all fonts, so just make them not special.  The @rm below
 %% makes sure that the current font starts out as the newly loaded cmr10