diff --git a/main/survey/preview.php b/main/survey/preview.php
index 86e0641f86..7f37a6f52e 100755
--- a/main/survey/preview.php
+++ b/main/survey/preview.php
@@ -203,8 +203,8 @@ if (api_is_course_admin() ||
     }
 
     $before = 0;
-    if (isset($_GET['show']) && isset($paged_questions[$_GET['show'] -1])) {
-        $before = count($paged_questions[$_GET['show'] -1]);
+    if (isset($_GET['show']) && isset($paged_questions[$_GET['show'] - 1])) {
+        $before = count($paged_questions[$_GET['show'] - 1]);
     }
 
     // Selecting the maximum number of pages
diff --git a/main/survey/question.php b/main/survey/question.php
index bd9722d351..ac28080c8f 100755
--- a/main/survey/question.php
+++ b/main/survey/question.php
@@ -138,7 +138,6 @@ switch ($_GET['type']) {
         break;
 }
 
-
 // We are editing a question
 if (isset($_GET['question_id']) && !empty($_GET['question_id'])) {
     $formData = SurveyManager::get_question($_GET['question_id']);
diff --git a/main/survey/survey.lib.php b/main/survey/survey.lib.php
index 0fdacadc15..91796cfd07 100755
--- a/main/survey/survey.lib.php
+++ b/main/survey/survey.lib.php
@@ -806,7 +806,7 @@ class SurveyManager
      * This function duplicates a survey (and also all the question in that survey.
      *
      * @param int $surveyId id of the survey that has to be duplicated
-     * @param int $courseId  id of the course which survey has to be duplicated
+     * @param int $courseId id of the course which survey has to be duplicated
      *
      * @return true
      *
@@ -2208,7 +2208,6 @@ class SurveyManager
                     ];
                     self::save_question($surveyData, $values);
                 }
-
             }
         }
     }