Grunt window gherkinlint does not work

Notes

1. Must be tested on Windows and Linux-like OS

Testing

1. Run gherkinlint across the entire codebase:

   grunt gherkinlint

   1. Confirm that there were no failures reported
2. Open mod/forum/tests/behat/add_forum.feature in your preferred editor
3. Add a single space at the start of the "{{Feature: }}" line (line 2)
4. Run the check again:

   grunt gherkinlint

   1. Confirm that the error was detected

      Running "gherkinlint" task

      /Users/nicols/Sites/moodles/s38/moodle/mod/forum/tests/behat/add_forum.feature

      2 Wrong indentation for "Feature", expected indentation level of 0, but got 1 indentation

5. Run grunt watch:

   grunt watch

6. Touch the file in some way (literally just save it again)
   1. Confirm that the error was detected again

38 and master only

1. Run the check with just one file:

   grunt gherkinlint --files=mod/forum/tests/behat/add_forum.feature

   1. Confirm that the error was detected again
2. Run on a different file:

   grunt gherkinlint --files=mod/forum/tests/behat/add_forum_inline.feature

   1. Confirm that no error was shown
3. Change into the mod/forum directory
4. Run the grunt watch command again:

   cd mod/forum

   grunt watch

5. Touch the file in some way (literally just save it again)
   1. Confirm that the error was detected again