debugcommands: fix a missing b prefix
This wasn't causing any immediate problems because of the source
transformer, but I noticed the inconsistency and it bugged me.
# skip-blame just a b prefix
Differential Revision: https://phab.mercurial-scm.org/D4255
BasedOnStyle: LLVM
IndentWidth: 8
UseTab: ForIndentation
BreakBeforeBraces: Linux
AllowShortIfStatementsOnASingleLine: false
IndentCaseLabels: false
AllowShortBlocksOnASingleLine: false
AllowShortFunctionsOnASingleLine: false
IncludeCategories:
- Regex: '^<'
Priority: 1
- Regex: '^"'
Priority: 2