tests-racy-mutation: pass the editor through config instead of env variable
On Windows msys seems to do awful mangling of the environment variable content
that confuses everything to the death. Going through the config works fine, so
we do that instead.
Differential Revision: https://phab.mercurial-scm.org/D12479
BasedOnStyle: LLVM
IndentWidth: 8
UseTab: ForIndentation
BreakBeforeBraces: Linux
AllowShortIfStatementsOnASingleLine: false
IndentCaseLabels: false
AllowShortBlocksOnASingleLine: false
AllowShortFunctionsOnASingleLine: false
IncludeCategories:
- Regex: '^<'
Priority: 1
- Regex: '^"'
Priority: 2