llegal character in prototype for main::commits_for_month : $repo, $since, $until at ./gitter.pl line 7.
Global symbol "$repo" requires explicit package name (did you forget to declare "my $repo"?) at ./gitter.pl line 10.
Global symbol "$since" requires explicit package name (did you forget to declare "my $since"?) at ./gitter.pl line 10.
Global symbol "$until" requires explicit package name (did you forget to declare "my $until"?) at ./gitter.pl line 11.
./gitter.pl had compilation errors.