setup: allow py3 install without env vars
5.2 is the first release of Mercurial where py3 support is expected to be
widely used, therefore we should allow installing it without hoop-jumping.
Differential Revision: https://phab.mercurial-scm.org/D7151
BasedOnStyle: LLVM
IndentWidth: 8
UseTab: ForIndentation
BreakBeforeBraces: Linux
AllowShortIfStatementsOnASingleLine: false
IndentCaseLabels: false
AllowShortBlocksOnASingleLine: false
AllowShortFunctionsOnASingleLine: false
IncludeCategories:
- Regex: '^<'
Priority: 1
- Regex: '^"'
Priority: 2