cleaning up comments

backup/moodle2/restore_qtype_gapfill_plugin.class.php

@@ -183,13 +183,12 @@ public function process_question_answer($data) {
             $params = array($newquestionid, $data->answertext);
             $newitemid = $DB->get_field_sql($sql, $params, IGNORE_MULTIPLE);
 
-            // Not able to find the answer, let's try cleaning the answertext
+            // Not able to find the answer, let's try cleaning the answertext.
             // of all the question answers in DB as slower fallback. MDL-30018.
             if (!$newitemid) {
                 $params = array('question' => $newquestionid);
                 $answers = $DB->get_records('question_answers', $params, '', 'id, answer');
                 foreach ($answers as $answer) {
-                    // Clean in the same way than {@link xml_writer::xml_safe_utf8()}.
                     $clean = preg_replace('/[\x-\x8\xb-\xc\xe-\x1f\x7f]/is', '', $answer->answer); // Clean CTRL chars.
                     $clean = preg_replace("/\r\n|\r/", "\n", $clean); // Normalize line ending.
                     if ($clean === $data->answertext) {

questiontype.php

@@ -56,12 +56,6 @@ public function extra_question_fields() {
             'noduplicates', 'disableregex', 'fixedgapsize', 'optionsaftertext', 'letterhints');
     }
 
-    /**
-     * Utility method used by {@link qtype_renderer::head_code()}
-     * It looks for any of the files script.js or script.php that
-     * exist in the plugin folder and ensures they get included.
-     * It also includes the jquery files required for this plugin
-     */
 
     /**
      * Called during question editing

renderer.php

@@ -115,12 +115,13 @@ public function formulation_and_controls(question_attempt $qa, question_display_
                 $output .= $answeroptions . '</div>' . $questiontext;
             }
         } else {
-            /*for gapfill and dropdown rendering */
+            // For gapfill and dropdown rendering.
             $output .= $questiontext;
         }
 
         if ($qa->get_state() == question_state::$invalid) {
-            $output .= html_writer::nonempty_tag('div', $question->get_validation_error(array('answer' => $output)), array('class' => 'validationerror'));
+            $output .= html_writer::nonempty_tag('div', $question->get_validation_error(array('answer' => $output)),
+             ['class' => 'validationerror']);
         }
         $output .= html_writer::end_div();