tests/test-check-jshint.t

templatefilters: raise ProgrammingError if unencodable type passed to json()

This shouldn't happen for any template data types (though I know it does
because of some templater bugs.) Let's clarify it is a bug.

#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