Don't generate git patches that rename a file to multiple destinations With this patch, instead of generating N renames, we'll generate 1 rename and N-1 copies. Ideally the rename should come after the copies instead of before them, but that'd be harder to do.

adding he
llo
abort: '\n' and '\r' disallowed in filenames
adding he
llo
abort: '\n' and '\r' disallowed in filenames
hell
o
nothing changed