PEP8 fixes for E271 (multiple spaces after keyword).
PEP8 fixes for E231 (missing whitespace after delimiters).
Fix PEP8 E713 issues (test for membership should be ‘not in’)
Fix PEP8 E703 (statement ends with a semicolon).
Fix PEP8 E714 issues (test for object identity should be ‘is not’).
Fix PEP8 E401 issues (multiple imports on one line).
Fix PEP8 W191 (indentation contains tabs).