1 Add --git option to generate output compatible with 'git diff -p'.
2 This would behave like 'diff -p', except that it would also generate
3 the extended headers 'old mode', 'new mode', 'deleted file mode', and
4 'new file mode', and it would quote file names with unusual characters.
5 GNU patch already parses this format.
7 Add --include option (opposite of --exclude).
9 Look into sdiff improvement here:
10 http://www.pkix.net/~chuck/sdiff2.diff
12 Propagate stderr from subprocess so that diff3 does
13 a better job of explaining _why_:
14 > $ diff3 /bin/sh /bin/false /bin/mv
15 > diff3: subsidiary program 'diff' failed (exit status 2)