Some fixes in multiple comments

- Shortened crc
- Fixed NPE when no comments found
Fixed format

- Now numbers < 0 should look way better
- Uppercased all letters
Added option for commenting only changed lines

- Will create test tumorrow
Simplest methods are always the best

- Crc is not needed we are comparing whole line
Update stash-diff.json

- Repaired tests
Merge pull request #1 from ingwarsw/fix_duplicated_comments

Some fixes in multiple comments