diff --git a/README.md b/README.md
index 30da659217..74dd4f8ef2 100644
--- a/README.md
+++ b/README.md
@@ -171,7 +171,9 @@ Libraries
 
 Get the token:
 
-`curl -k -X POST -H "Content-Type: application/json" https://example.com/api/authentication_token -d '{"username":"admin","password":"admin"}'`
+```
+curl -k -X POST -H "Content-Type: application/json" https://example.com/api/authentication_token -d '{"username":"admin","password":"admin"}'
+```
 
 The response should return something like:
 
diff --git a/src/CoreBundle/Security/Authorization/Voter/CourseVoter.php b/src/CoreBundle/Security/Authorization/Voter/CourseVoter.php
index 4db4fc59b3..eec369b692 100644
--- a/src/CoreBundle/Security/Authorization/Voter/CourseVoter.php
+++ b/src/CoreBundle/Security/Authorization/Voter/CourseVoter.php
@@ -46,6 +46,7 @@ class CourseVoter extends Voter
         if (!\in_array($attribute, $options, true)) {
             return false;
         }
+
         // only vote on Post objects inside this voter
         return $subject instanceof Course;
     }
@@ -54,12 +55,12 @@ class CourseVoter extends Voter
     {
         /** @var User $user */
         $user = $token->getUser();
-        // Anons can enter a course depending of the course visibility
+        // Anons can enter a course depending on the course visibility.
         /*if (!$user instanceof UserInterface) {
             return false;
         }*/
 
-        // Admins have access to everything
+        // Admins have access to everything.
         if ($this->security->isGranted('ROLE_ADMIN')) {
             return true;
         }
diff --git a/src/CourseBundle/Controller/ToolBaseController.php b/src/CourseBundle/Controller/ToolBaseController.php
index fbdff30a67..006bd2084a 100644
--- a/src/CourseBundle/Controller/ToolBaseController.php
+++ b/src/CourseBundle/Controller/ToolBaseController.php
@@ -11,7 +11,7 @@ use Chamilo\CoreBundle\Traits\ControllerTrait;
 use Chamilo\CoreBundle\Traits\CourseControllerTrait;
 
 /**
- * Each entity controller must extends this class.
+ * Each entity controller must extend this class.
  *
  * @abstract
  */