Put colon-separated compound statement on separate lines.

Format block comment.

Test for membership should be 'not in'.

Put imports in same block alphabeticaly.

Make exactly one space after comma.

Match closing bracket identation of opening bracket's line.

Fix spacing after comment hash.

Remove whitespace around parameter '=' sign.

Fix missing whitespace around operator.

Use isinstance() instead of type() for a typecheck.

Add missing blank line.

tests: match closing bracket for visual identation

Format block comments.

tests: fix comparison with None.

Add missing whitespace.

Fix quantity of blank lines after code object.

utils: remove trailing whitespace