Mention PEP8 work in NEWS
Fix colon spacing / PEP8 E203
Fix colon spacing in lambda / PEP8 E203
Indent comments the same as the code they belong to (PEP8 E112).
Fix PEP8 E111 (indentation is not a multiple of four).
Remove redundant backslashes within brackets (PEP8 E502).
Fixes for PEP8 E201 and E202 (whitespace before and after brackets).
Fixes for PEP8 E113 (unexpected indentation).
Fix PEP8 E3 issues (too few or too many blank lines).
Fix PEP8 W293 (blank line contains whitespace).
Fix PEP8 E502 (the backslash is redundant between brackets).