MDL-34065 questions: also fix two typos in comments.

Amended to change 2 accordin => according

question/engine/states.php

@@ -206,7 +206,7 @@ abstract class question_state {
      * Appropriate allowance is made for rounding float values.
      *
      * @param number $fraction the grade, on the fraction scale.
-     * @return int one of the state constants.
+     * @return question_state one of the state constants.
      */
     public static function graded_state_for_fraction($fraction) {
         if ($fraction < 0.000001) {

question/type/rendererbase.php

@@ -130,7 +130,7 @@ abstract class qtype_renderer extends plugin_renderer_base {
     }
 
     /**
-     * Gereate the specific feedback. This is feedback that varies accordin to
+     * Generate the specific feedback. This is feedback that varies according to
      * the reponse the student gave.
      * @param question_attempt $qa the question attempt to display.
      * @return string HTML fragment.
@@ -157,7 +157,7 @@ abstract class qtype_renderer extends plugin_renderer_base {
     }
 
     /**
-     * Gereate the specific feedback. This is feedback that varies accordin to
+     * Gereate the specific feedback. This is feedback that varies according to
      * the reponse the student gave.
      * @param question_attempt $qa the question attempt to display.
      * @return string HTML fragment.