Only check the changed lines

[Tadaboody]

Sometimes, some changes sneak into master that don't pass the checks.

If afterwards there a pull request is made in a completely different section of the code - the same checks will fail! with no fault of the contributor.

A possible fix for this is to only run checks on the lines that are changed by the PR.

[freakboy3742]

This should be what is currently being done - beefore filters it's responses to lines that match the range of the diff of the patch being examined.

Can you provide an example where this has happened?