Re: diff "--git"

[Alfred M. Szmidt]

   $ diff --git
   diff: unrecognized option '--git'

   I think diff should say at this point "real diff, at least up to year
   2010, does not have a --git option, you are probably getting that idea
   from git output" or something.

That is what it says, though not in so many words.  Having an option
for each VS would really be a headache (SCCS, RCS, CVS, hg, darcs,
bzr, tla, git, ...).