use pep8 standard

hi

pep8 is best Python coding standard I think.

If you don't like it, just close the PR.

Thanks. :smiley: 
That hanging indent is indeed slightly against the standard PEP-8 recommendations, where it is recommended that hanging indents "should add a level" (but a provision also allows that "[hanging] indents *may* be indented to other than 4 spaces").

The suggested fix, however, would make the indentation for the `%` string formatting operator incorrect. So that'll be a change to the worse, I fear.