adapted DOES_CODE in alpha.h m68k.h mips.h power.h and sparc.h
worked around a bug in SunOS4 in prims2x.fs
fixed typo in main.c
This form allows you to request diffs between any two revisions of
a file. You may select a symbolic revision name using the selection
box or you may type in a numeric name using the type-in text box.