templatekw: move getrenamedfn() to scmutil (API)
The function is already used by `hg log` (for following renames, not
for templates), so it seems it does not belong in templatekw.
Differential Revision: https://phab.mercurial-scm.org/D6021
BasedOnStyle: LLVM
IndentWidth: 8
UseTab: ForIndentation
BreakBeforeBraces: Linux
AllowShortIfStatementsOnASingleLine: false
IndentCaseLabels: false
AllowShortBlocksOnASingleLine: false
AllowShortFunctionsOnASingleLine: false
IncludeCategories:
- Regex: '^<'
Priority: 1
- Regex: '^"'
Priority: 2