Exercise: Fix deprecated syntax with optional param before mandatory in display_fill_in_blanks_answer()

public/main/exercise/exercise.class.php

@@ -4940,8 +4940,8 @@ class Exercise
                                 0,
                                 0,
                                 $results_disabled,
-                                '',
-                                $showTotalScoreAndUserChoicesInLastAttempt
+                                $showTotalScoreAndUserChoicesInLastAttempt,
+                                ''
                             );
                         } elseif (CALCULATED_ANSWER == $answerType) {
                             ExerciseShowFunctions::display_calculated_answer(
@@ -5334,8 +5334,8 @@ class Exercise
                                 $exeId,
                                 $questionId,
                                 $results_disabled,
-                                $str,
-                                $showTotalScoreAndUserChoicesInLastAttempt
+                                $showTotalScoreAndUserChoicesInLastAttempt,
+                                $str
                             );
 
                             break;

public/main/inc/lib/exercise_show_functions.lib.php

@@ -16,8 +16,8 @@ class ExerciseShowFunctions
      * @param int      $id                           Exercise ID
      * @param int      $questionId                   Question ID
      * @param int      $resultsDisabled
-     * @param string   $originalStudentAnswer
      * @param bool     $showTotalScoreAndUserChoices
+     * @param string   $originalStudentAnswer
      */
     public static function display_fill_in_blanks_answer(
         $exercise,
@@ -26,8 +26,8 @@ class ExerciseShowFunctions
         $id,
         $questionId,
         $resultsDisabled,
-        $originalStudentAnswer = '',
-        $showTotalScoreAndUserChoices
+        $showTotalScoreAndUserChoices,
+        $originalStudentAnswer = ''
     ) {
         $answerHTML = FillBlanks::getHtmlDisplayForAnswer(
             $answer,