PAReview.sh error, Expected "switch (...) {\n"; found "switch(...) {\n"
Put simple switch, why put curly braces.

    function _MYTHEME_content_grid($columns = 1) {

      $class = FALSE;
      switch($columns) {

        // No sidebars, just content.
        case 1:
          $class = 'grid-100';
          break;
        case 2:
          //something
          break;   

       // etc...
     }
   }