formatter: inline a variable assigned from `templater.templater.frommapfile`
The variable doesn't get reused and it doesn't help formatting, so I
don't see any reason for it.
Differential Revision: https://phab.mercurial-scm.org/D8807
BasedOnStyle: LLVM
IndentWidth: 8
UseTab: ForIndentation
BreakBeforeBraces: Linux
AllowShortIfStatementsOnASingleLine: false
IndentCaseLabels: false
AllowShortBlocksOnASingleLine: false
AllowShortFunctionsOnASingleLine: false
IncludeCategories:
- Regex: '^<'
Priority: 1
- Regex: '^"'
Priority: 2