standardize to modern 'except FooError as err:' syntax (Final Part 4)
fix more typos; capitalize more acronyms
rm unnecessary `pass` flagged by pylint
Merge pull request #4819 from hulu/except-as-four-final

standardize to modern 'except FooError as err:' syntax (Final Part 4)
Merge pull request #4820 from hulu/acronyms-and-typos

fix more typos; capitalize more acronyms
Merge pull request #4821 from cvrebert/patch-3

rm unnecessary `pass` flagged by pylint