testrunner: on error, color the "(case xxx)" part the same as filename
When using #testcases, the lines that read something like
ERROR: test-split.t (case obsstore-off) output changed
get colored red and the filename gets highlighted with a brighter
red. This makes it harder to notice the "case obsstore-off" part, but
it does seem important, so let's highlight it.
Differential Revision: https://phab.mercurial-scm.org/D1959
BasedOnStyle: LLVM
IndentWidth: 8
UseTab: ForIndentation
BreakBeforeBraces: Linux
AllowShortIfStatementsOnASingleLine: false
IndentCaseLabels: false
AllowShortBlocksOnASingleLine: false
AllowShortFunctionsOnASingleLine: false