convert: mercurial_source: also search for copies in modified files
There are some corner cases where we may have a copy in a file that
isn't in the added list:
- the result of a hg copy --after --force
- after a merge across a (local) rename
#!/bin/sh
hg init
echo "Is there an error message when trying to diff non-existing files?"
hg diff not found
echo "Is there an error message when trying to add non-existing files?"
hg add not found