I am unlucky enough to have to deal with different line endings from different operation systems :)

This patch will preserve line endings in diff files

I see a few solutions, for various CRLF vs LF problems. This simple patch allows applying diffs to files generated on a CRLF OS, but where the diff was generated on a LF OS. I have not needed to try other combinations. 

All unittests for diff parsing and patching pass