tests: put some Python 3 polish on inline Python invocations
A couple of these became inline python sessions because they got more
involved, and one of them is super-annoying and writes directly to
sys.stdout.buffer because I just couldn't make it work any other way.
Differential Revision: https://phab.mercurial-scm.org/D4230
BasedOnStyle: LLVM
IndentWidth: 8
UseTab: ForIndentation
BreakBeforeBraces: Linux
AllowShortIfStatementsOnASingleLine: false
IndentCaseLabels: false
AllowShortBlocksOnASingleLine: false
AllowShortFunctionsOnASingleLine: false
IncludeCategories:
- Regex: '^<'
Priority: 1
- Regex: '^"'
Priority: 2