tests/test-check-jshint.t

grep: add config knob to enable/disable the default wdir search

This allows us to conditionally enable the new behavior to unbreak
python-hglib. See the next patch.

The config option is undocumented since the --all-files is still experimental
and isn't fully implemented. It can be moved to [experimental] if that's
preferred.

Differential Revision: https://phab.mercurial-scm.org/D3918

#require test-repo jshint hg10

  $ . "$TESTDIR/helpers-testrepo.sh"

run jshint on all tracked files ending in .js except vendored dependencies

  $ cd "`dirname "$TESTDIR"`"

  $ testrepohg locate 'set:**.js' \
  > 2>/dev/null \
  > | xargs jshint