formatter: remove now-unnecessary check for file-ness
`templater.templatepath()` now returns non-`None` only for files, so
the caller doesn't have to check.
Differential Revision: https://phab.mercurial-scm.org/D8805
BasedOnStyle: LLVM
IndentWidth: 8
UseTab: ForIndentation
BreakBeforeBraces: Linux
AllowShortIfStatementsOnASingleLine: false
IndentCaseLabels: false
AllowShortBlocksOnASingleLine: false
AllowShortFunctionsOnASingleLine: false
IncludeCategories:
- Regex: '^<'
Priority: 1
- Regex: '^"'
Priority: 2