tests: add test for bad template %include and __base__
It doesn't seem like we had any tests for `%include non-existent` and
`__base__ = non-existent`. The latter raises an error while the former
ignores the include. We should probably also make the former an error.
Differential Revision: https://phab.mercurial-scm.org/D8798
BasedOnStyle: LLVM
IndentWidth: 8
UseTab: ForIndentation
BreakBeforeBraces: Linux
AllowShortIfStatementsOnASingleLine: false
IndentCaseLabels: false
AllowShortBlocksOnASingleLine: false
AllowShortFunctionsOnASingleLine: false
IncludeCategories:
- Regex: '^<'
Priority: 1
- Regex: '^"'
Priority: 2