diff --git a/main/inc/lib/ExerciseCategoryManager.php b/main/inc/lib/ExerciseCategoryManager.php
index d936236863..8c83af85d4 100644
--- a/main/inc/lib/ExerciseCategoryManager.php
+++ b/main/inc/lib/ExerciseCategoryManager.php
@@ -1,4 +1,5 @@
 <?php
+
 /* For licensing terms, see /license.txt */
 
 use Chamilo\CourseBundle\Entity\CExerciseCategory;
@@ -103,7 +104,7 @@ class ExerciseCategoryManager extends Model
             $table = Database::get_course_table(TABLE_QUIZ_TEST);
             $id = (int) $id;
 
-            $sql = "UPDATE $table SET exercise_category_id = 0 
+            $sql = "UPDATE $table SET exercise_category_id = 0
                     WHERE c_id = $courseId AND exercise_category_id = $id";
             Database::query($sql);
         }
@@ -117,7 +118,6 @@ class ExerciseCategoryManager extends Model
      */
     public function save($params, $showQuery = false)
     {
-        $courseId = api_get_course_int_id();
         $em = Database::getManager();
         $category = new CExerciseCategory();
         $category
@@ -176,7 +176,7 @@ JAVASCRIPT;
             </a>
 JAVASCRIPT;
 
-        return "function action_formatter(cellvalue, options, rowObject) {        
+        return "function action_formatter(cellvalue, options, rowObject) {
             return '$editButton $deleteButton';
         }";
     }
diff --git a/main/inc/lib/exercise.lib.php b/main/inc/lib/exercise.lib.php
index ce01d74961..348889c5a0 100644
--- a/main/inc/lib/exercise.lib.php
+++ b/main/inc/lib/exercise.lib.php
@@ -6035,9 +6035,9 @@ EOT;
                                         continue;
                                     }
                                 } else {
-                                   if (false === $passBlock) {
-                                       continue;
-                                   }
+                                    if (false === $passBlock) {
+                                        continue;
+                                    }
                                 }
                             }
 
diff --git a/main/inc/lib/export.lib.inc.php b/main/inc/lib/export.lib.inc.php
index 1f27bc1ade..8bcad81cc2 100755
--- a/main/inc/lib/export.lib.inc.php
+++ b/main/inc/lib/export.lib.inc.php
@@ -1,4 +1,5 @@
 <?php
+
 /* See license terms in /license.txt */
 
 use Chamilo\CoreBundle\Component\Editor\Connector;
@@ -15,8 +16,6 @@ use Symfony\Component\Filesystem\Filesystem;
  *  This is the export library for Chamilo.
  *	Include/require it in your code to use its functionality.
  *	Several functions below are adaptations from functions distributed by www.nexen.net.
- *
- *  @package chamilo.library
  */
 class Export
 {