py3: fix formatting of LookupError for workingctx
Spotted while writing broken tests for "hg grep -fr'wdir()'".
basectx._fileinfo() raises ManifestLookupError(self._node, ..), but _node
of the workingctx is None for historical reasons.
BasedOnStyle: LLVM
IndentWidth: 8
UseTab: ForIndentation
BreakBeforeBraces: Linux
AllowShortIfStatementsOnASingleLine: false
IndentCaseLabels: false
AllowShortBlocksOnASingleLine: false
AllowShortFunctionsOnASingleLine: false
IncludeCategories:
- Regex: '^<'
Priority: 1
- Regex: '^"'
Priority: 2