MDL-26546 Workshop: fixed embedded images in Number of errors grading…

… form

Because of this typo, embedded images were not loaded when the
assessment form was re-edited. Thanks Helen Foster for spotting this.

mod/workshop/form/numerrors/lib.php

@@ -124,7 +124,7 @@ public function get_edit_strategy_form($actionurl=null) {
         for ($i = 0; $i < $nodimensions; $i++) {
             // prepare all editor elements
             $fields = file_prepare_standard_editor($fields, 'description__idx_'.$i, $this->descriptionopts,
-                $PAGE->context, 'workshopform_numerror', 'description', $fields->{'dimensionid__idx_'.$i});
+                $PAGE->context, 'workshopform_numerrors', 'description', $fields->{'dimensionid__idx_'.$i});
         }
 
         $customdata = array();