py3: add missing b'' prefixes in couple of test files
These were missed in the earlier patch and caught by Yuya.
# skip-blame because just b'' prefix
Differential Revision: https://phab.mercurial-scm.org/D4613
BasedOnStyle: LLVM
IndentWidth: 8
UseTab: ForIndentation
BreakBeforeBraces: Linux
AllowShortIfStatementsOnASingleLine: false
IndentCaseLabels: false
AllowShortBlocksOnASingleLine: false
AllowShortFunctionsOnASingleLine: false
IncludeCategories:
- Regex: '^<'
Priority: 1
- Regex: '^"'
Priority: 2