pep8-ified pywikibot/site.py

Change-Id: I8e09bf2655bd9c7f39f981bfc8381c0ee8168ec8
Merge "pep8-ified pywikibot/site.py"
support edit summary in Site.editSource and Site.changeClaimTarget

Change-Id: Ic4b9da9d1e0a3a7e7aa1b9551b304d7cfed9e7dc
bug fix for "SyntaxError: EOL while scanning string literal"

(what went wrong with this review - how has that been merged...? ;))

Change-Id: I9b0b6b7d33f0c0fe53d9f99109d0f935c866f215
Merge "support edit summary in Site.editSource and Site.changeClaimTarget"