gitstats: Bugfix for diff -i, also removed debug output
The -i switch inverts the comparison between lines removed
and lines added so that the lines removed are compared with
the lines deleted and vise versa. In the initial
implementation the content comparison was switched properly
but the line comparison was not, so that the proper matches
were never found.
The initial implementation also contained some debug output
which was never removed, this fixes that too.
Bug-introduced-in:
bc9d1040f323a0b09674f0a1c6ec7048e31580ab