tests: add bytes prefixes to test-histedit-fold.t's local extension
# skip-blame b prefixes
Differential Revision: https://phab.mercurial-scm.org/D2246
BasedOnStyle: LLVM
IndentWidth: 8
UseTab: ForIndentation
BreakBeforeBraces: Linux
AllowShortIfStatementsOnASingleLine: false
IndentCaseLabels: false
AllowShortBlocksOnASingleLine: false
AllowShortFunctionsOnASingleLine: false