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.
#!/usr/bin/env python
#
import doctest
import mercurial.changelog
# test doctest from changelog
doctest.testmod(mercurial.changelog)