Whitespace In A Separate Commit
We are explicit about white[spaces|lines]. If the purpose is not to
remove/add an empty line, then the patch must not contain such change.
Same goes for python-meaningless spaces. A separate
commit must be done when fixing the coding style, especially in python where
some extra spaces can cause bugs. Although I believe everyone reading this page
has a decent python knowledge, it's better to be safe than sorry.