diff --git a/action.php b/action.php
index f8c53c33b0fc1ccef005b11da81b4fd515fc243a..56aeab2b8955fa7a8da55792bdbef5fced7aaf55 100644
--- a/action.php
+++ b/action.php
@@ -27,7 +27,7 @@
  *
  * @package   mod_pdfannotator
  * @copyright 2018 RWTH Aachen (see README.md)
- * @author   Rabea de Groot, Anna Heynkes, Friederike Schwager
+ * @author    Rabea de Groot, Anna Heynkes, Friederike Schwager
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
@@ -388,8 +388,6 @@ if ($action === 'getComments') {
 
     $comments = pdfannotator_comment::read($documentid, $annotationid, $context);
 
- //   require_once($CFG->dirroot . '/mod/pdfannotator/classes/output/comment.php');
-    
     $myrenderer = $PAGE->get_renderer('mod_pdfannotator');
     $templatable = new comment($comments, $cm, $context);
 
@@ -455,7 +453,7 @@ if ($action === 'editComment') {
 
     $commentid = required_param('commentId', PARAM_INT);
     $content = required_param('content', PARAM_RAW);
- 
+
     $data = pdfannotator_comment::update($commentid, $content, $editanypost);
     echo json_encode($data);
 }
diff --git a/backup/moodle2/backup_pdfannotator_activity_task.class.php b/backup/moodle2/backup_pdfannotator_activity_task.class.php
index 09d938efba17c6d0792f94126e823d1fdf1c0546..849257d5272ad69bc4280a7f9a4c9bb228227e97 100644
--- a/backup/moodle2/backup_pdfannotator_activity_task.class.php
+++ b/backup/moodle2/backup_pdfannotator_activity_task.class.php
@@ -75,7 +75,7 @@ class backup_pdfannotator_activity_task extends backup_activity_task {
      * @param string $content some HTML text that eventually contains URLs to the activity instance scripts
      * @return string the content with the URLs encoded
      */
-    static public function encode_content_links($content) {
+    public static function encode_content_links($content) {
 
         global $CFG, $DB;
 
diff --git a/backup/moodle2/backup_pdfannotator_stepslib.php b/backup/moodle2/backup_pdfannotator_stepslib.php
index 48fd73bd1d8af62ad038afce1866eadf0c45dc39..05052412c8cb3615e17950be9480513c3d073284 100644
--- a/backup/moodle2/backup_pdfannotator_stepslib.php
+++ b/backup/moodle2/backup_pdfannotator_stepslib.php
@@ -54,23 +54,27 @@ class backup_pdfannotator_activity_structure_step extends backup_activity_struct
 
         // 2. Define each element separately.
         $pdfannotator = new backup_nested_element('pdfannotator', array('id'), array(
-            'name', 'intro', 'introformat', 'usevotes', 'useprint', 'useprintcomments', 'use_studenttextbox', 'use_studentdrawing', 'useprivatecomments', 'useprotectedcomments', 'timecreated', 'timemodified'));
+            'name', 'intro', 'introformat', 'usevotes', 'useprint', 'useprintcomments', 'use_studenttextbox', 'use_studentdrawing',
+            'useprivatecomments', 'useprotectedcomments', 'timecreated', 'timemodified'));
 
             $annotations = new backup_nested_element('annotations');
-            $annotation = new backup_nested_element('annotation', array('id'), array('page', 'userid', 'annotationtypeid', 'data', 'timecreated', 'timemodified', 'modifiedby'));
+            $annotation = new backup_nested_element('annotation', array('id'), array('page', 'userid', 'annotationtypeid',
+                'data', 'timecreated', 'timemodified', 'modifiedby'));
 
                 $subscriptions = new backup_nested_element('subscriptions');
                 $subscription = new backup_nested_element('subscription', array('id'), array('userid'));
 
                 $comments = new backup_nested_element('comments');
-                $c = array('pdfannotatorid', 'userid', 'content', 'timecreated', 'timemodified', 'modifiedby', 'visibility', 'isquestion', 'isdeleted', 'ishidden', 'solved');
+                $c = array('pdfannotatorid', 'userid', 'content', 'timecreated', 'timemodified', 'modifiedby', 'visibility',
+                    'isquestion', 'isdeleted', 'ishidden', 'solved');
                 $comment = new backup_nested_element('comment', array('id'), $c);
 
                     $votes = new backup_nested_element('votes');
                     $vote = new backup_nested_element('vote', array('id'), array('userid', 'annotationid'));
 
                     $reports = new backup_nested_element('reports');
-                    $report = new backup_nested_element('report', array('id'), array('courseid', 'pdfannotatorid', 'message', 'userid', 'timecreated', 'seen'));
+                    $report = new backup_nested_element('report', array('id'), array('courseid', 'pdfannotatorid', 'message',
+                        'userid', 'timecreated', 'seen'));
 
         // 3. Build the tree (mind the right order!)
         $pdfannotator->add_child($annotations);
@@ -96,7 +100,8 @@ class backup_pdfannotator_activity_structure_step extends backup_activity_struct
             // Add all annotations specific to this annotator instance.
             $annotation->set_source_sql('SELECT a.* FROM {pdfannotator_annotations} a '
                                         . 'JOIN {pdfannotator_comments} c ON a.id = c.annotationid '
-                                        . "WHERE a.pdfannotatorid = ? AND c.isquestion = 1 AND (c.visibility = 'public' OR c.visibility = 'anonymous') ",
+                                        . "WHERE a.pdfannotatorid = ? AND c.isquestion = 1 AND "
+                                        . "(c.visibility = 'public' OR c.visibility = 'anonymous') ",
                                         array('pdfannotatorid' => backup::VAR_PARENTID));
 
                 // Add any subscriptions to this annotation.
diff --git a/backup/moodle2/restore_pdfannotator_activity_task.class.php b/backup/moodle2/restore_pdfannotator_activity_task.class.php
index 98728586c9209bf72288e6f678cb3aa0ab510e06..25ca6b9407f23f41ecdec89cc4ba68abbc4b792c 100644
--- a/backup/moodle2/restore_pdfannotator_activity_task.class.php
+++ b/backup/moodle2/restore_pdfannotator_activity_task.class.php
@@ -57,7 +57,7 @@ class restore_pdfannotator_activity_task extends restore_activity_task {
      * Define the contents in the activity that must be
      * processed by the link decoder.
      */
-    static public function define_decode_contents() {
+    public static function define_decode_contents() {
         $contents = array();
 
         $contents[] = new restore_decode_content('pdfannotator', array('intro'), 'pdfannotator');
@@ -69,7 +69,7 @@ class restore_pdfannotator_activity_task extends restore_activity_task {
      * Define the decoding rules for links belonging
      * to the activity to be executed by the link decoder
      */
-    static public function define_decode_rules() {
+    public static function define_decode_rules() {
         $rules = array();
 
         $rules[] = new restore_decode_rule('PDFANNOTATORVIEWBYID', '/mod/pdfannotator/view.php?id=$1', 'course_module');
@@ -85,7 +85,7 @@ class restore_pdfannotator_activity_task extends restore_activity_task {
      * pdfannotator logs. It must return one array
      * of {@see restore_log_rule} objects
      */
-    static public function define_restore_log_rules() {
+    public static function define_restore_log_rules() {
         $rules = array();
 
         $rules[] = new restore_log_rule('pdfannotator', 'add', 'view.php?id={course_module}', '{pdfannotator}');
@@ -105,7 +105,7 @@ class restore_pdfannotator_activity_task extends restore_activity_task {
      * by the restore final task, but are defined here at
      * activity level. All them are rules not linked to any module instance (cmid = 0)
      */
-    static public function define_restore_log_rules_for_course() {
+    public static function define_restore_log_rules_for_course() {
         $rules = array();
 
         $rules[] = new restore_log_rule('pdfannotator', 'view all', 'index.php?id={course}', null);
diff --git a/classes/event/report_added.php b/classes/event/report_added.php
index e0f3384f3409e2e94a607573f7f6561d1d717995..affbd351641b97633e23f613b6c56bf67e2deaee 100644
--- a/classes/event/report_added.php
+++ b/classes/event/report_added.php
@@ -54,4 +54,4 @@ class report_added extends \core\event\base {
     public function get_url() {
         return new \moodle_url('/mod/pdfannotator/view.php', array('id' => $this->other['cmid'], 'action' => 'overview'));
     }
-}
\ No newline at end of file
+}
diff --git a/classes/output/comment.php b/classes/output/comment.php
index 65286e07cc8cd2f030c69ea1c432341ba3281a4f..b212b83635411e898cdcab1a53d01975d562ff31 100644
--- a/classes/output/comment.php
+++ b/classes/output/comment.php
@@ -17,6 +17,8 @@
 namespace mod_pdfannotator\output;
 use moodle_url;
 
+defined('MOODLE_INTERNAL') || die();
+
 /**
  * Renderable for comments.
  *
@@ -25,8 +27,6 @@ use moodle_url;
  * @author    Friederike Schwager
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
-defined('MOODLE_INTERNAL') || die();
-
 class comment implements \renderable, \templatable {
 
     private $comments = [];
diff --git a/classes/output/printview.php b/classes/output/printview.php
index 5fa9b3f1055914a4d2b8292cecf833d7c940fdde..b6bbff029d0b20a8c123d1da2bb76f0d9347dbea 100644
--- a/classes/output/printview.php
+++ b/classes/output/printview.php
@@ -52,4 +52,4 @@ class printview implements \renderable, \templatable {
         return $data;
     }
 
-}
\ No newline at end of file
+}
diff --git a/classes/privacy/provider.php b/classes/privacy/provider.php
index e85dea91b7236e5c5e782868f4715e4534187443..633817e73dd8f412674f2d7f378d5a5bac494075 100644
--- a/classes/privacy/provider.php
+++ b/classes/privacy/provider.php
@@ -440,4 +440,4 @@ class provider implements \core_privacy\local\metadata\provider, \core_privacy\l
         }
     }
 
-}
\ No newline at end of file
+}
diff --git a/constants.php b/constants.php
index d633babd79585b3bfc1f56549f2461c690d6e79f..803c5a87859b86913d5450e7cdf97a06f0a37b49 100644
--- a/constants.php
+++ b/constants.php
@@ -16,7 +16,7 @@
 /**
  * @package   mod_pdfannotator
  * @copyright 2018 RWTH Aachen (see README.md)
- * @author   Rabea de Groot, Anna Heynkes, Friederike Schwager
+ * @author    Rabea de Groot, Anna Heynkes, Friederike Schwager
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
@@ -36,6 +36,6 @@ define('LATEX_TO_PNG_GOOGLE_API', 1);
 
 
 /**
- * Prefix needed for encode64 imaged
+ * Prefix needed for encode64 images
  */
-define('IMAGE_PREFIX', 'data:image/png;base64,');
\ No newline at end of file
+define('IMAGE_PREFIX', 'data:image/png;base64,');
diff --git a/controller.php b/controller.php
index 00f0b278a6d5da7979407b9eadf0941f2f8b007b..5830dccbbb13e128a712776362843719f9fa2285 100644
--- a/controller.php
+++ b/controller.php
@@ -17,7 +17,7 @@
 /**
  * @package   mod_pdfannotator
  * @copyright 2018 RWTH Aachen (see README.md)
- * @author   Anna Heynkes, Friederike Schwager
+ * @author    Anna Heynkes, Friederike Schwager
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
@@ -570,4 +570,4 @@ if ($action === 'report') {
         $mform->display();
     }
     return;
-}
\ No newline at end of file
+}
diff --git a/db/events.php b/db/events.php
index 933baf50c79fb564badb324379b77c2c61f1abff..72330f6fe23adda944ee11903ff12b426fa2f0f8 100644
--- a/db/events.php
+++ b/db/events.php
@@ -14,4 +14,4 @@
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
-defined('MOODLE_INTERNAL') || die();
\ No newline at end of file
+defined('MOODLE_INTERNAL') || die();
diff --git a/db/messages.php b/db/messages.php
index d9483ec833c6e9396706d919945abac4e07024bf..f9c94b8c88df720d194b23da360b7ddfa71f14b0 100644
--- a/db/messages.php
+++ b/db/messages.php
@@ -51,4 +51,4 @@ $messageproviders = array (
         'capability'  => 'mod/pdfannotator:getforwardedquestions', // Teacher capability.
     )
 
-);
\ No newline at end of file
+);
diff --git a/forward_form.php b/forward_form.php
index 4941bcaf5b306a534473607a674f43507f6ab0cc..fd4a6ca666b54bed8da7c7da3979a63292656750 100644
--- a/forward_form.php
+++ b/forward_form.php
@@ -72,8 +72,8 @@ class pdfannotator_forward_form extends moodleform {
         $mform->addRule('recipients', get_string('recipientrequired', 'pdfannotator'), 'required', null, 'client');
 
         // Textarea for message to the recipient.
-        $mform->addElement('textarea', 'message', get_string('messageforwardform', 'pdfannotator'), 
-			wrap="virtual" rows="5" cols="109"');
+        $mform->addElement('textarea', 'message', get_string('messageforwardform', 'pdfannotator'),
+            'wrap="virtual" rows="5" cols="109"');
 
         // Add submit and cancel buttons.
         $this->add_action_buttons($cancel = true, get_string('send', 'pdfannotator'));
diff --git a/index.php b/index.php
index 1cce2bca00dd316d411f56630a6c260e6bd8e404..250a547303b023e335de773a5c33e25919bd7cc8 100644
--- a/index.php
+++ b/index.php
@@ -146,4 +146,4 @@ foreach ($pdfannotators as $pdfannotator) {
 
 echo html_writer::table($table);
 
-echo $OUTPUT->footer();
\ No newline at end of file
+echo $OUTPUT->footer();
diff --git a/lang/en/pdfannotator.php b/lang/en/pdfannotator.php
index 533a49d7ce44760a886c623805e4b0206623f107..f06bb514fe77b5479915be0bf6cb63b8a9c84e77 100644
--- a/lang/en/pdfannotator.php
+++ b/lang/en/pdfannotator.php
@@ -17,7 +17,7 @@
 /**
  * @package   mod_pdfannotator
  * @copyright 2018 RWTH Aachen (see README.md)
- * @author   Rabea de Groot, Anna Heynkes, Friederike Schwager
+ * @author    Rabea de Groot, Anna Heynkes, Friederike Schwager
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  *
  */
diff --git a/lib.php b/lib.php
index 060c37a01efd10d604fabab58b39cb2e1cc95e4b..85b043354928d729c4780059063ae35b34b6ca71 100644
--- a/lib.php
+++ b/lib.php
@@ -16,7 +16,7 @@
 /**
  * @package   mod_pdfannotator
  * @copyright 2018 RWTH Aachen (see README.md)
- * @author   Ahmad Obeid, Rabea de Groot, Anna Heynkes
+ * @author    Ahmad Obeid, Rabea de Groot, Anna Heynkes
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 defined('MOODLE_INTERNAL') || die;
@@ -28,12 +28,18 @@ defined('MOODLE_INTERNAL') || die;
  */
 function pdfannotator_supports($feature) {
     switch($feature) {
-        case FEATURE_GROUPS:                  return true;
-        case FEATURE_GROUPINGS:               return true;
-        case FEATURE_MOD_INTRO:               return true;
-        case FEATURE_COMPLETION_TRACKS_VIEWS: return true;
-        case FEATURE_BACKUP_MOODLE2:          return true;
-        case FEATURE_SHOW_DESCRIPTION:        return true;
+        case FEATURE_GROUPS:
+            return true;
+        case FEATURE_GROUPINGS:
+            return true;
+        case FEATURE_MOD_INTRO:
+            return true;
+        case FEATURE_COMPLETION_TRACKS_VIEWS:
+            return true;
+        case FEATURE_BACKUP_MOODLE2:
+            return true;
+        case FEATURE_SHOW_DESCRIPTION:
+            return true;
 
         default:
             return null;
@@ -608,7 +614,7 @@ function pdfannotator_get_recent_mod_activity(&$activities, &$index, $timestart,
     $printposts = array();
     $context = context_course::instance($courseid);
     foreach ($posts as $post) {
-        if(!pdfannotator_can_see_comment($post, $context)) {
+        if (!pdfannotator_can_see_comment($post, $context)) {
             continue;
         }
         $printposts[] = $post;
diff --git a/locallib.php b/locallib.php
index 6a31d5743e41fe67ce5dcec8aaa8ceeba1752bbd..e01ead40fbb9f04fb43f5ed0d45cbc418a404a2e 100644
--- a/locallib.php
+++ b/locallib.php
@@ -16,7 +16,7 @@
 /**
  * @package   mod_pdfannotator
  * @copyright 2018 RWTH Aachen (see README)
- * @author   Rabea de Groot, Anna Heynkes, Friederike Schwager
+ * @author    Rabea de Groot, Anna Heynkes, Friederike Schwager
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
@@ -1805,4 +1805,4 @@ function pdfannotator_count_answers($annotationid, $context) {
         $count++;
     }
     return $count;
-}
\ No newline at end of file
+}
diff --git a/mod_form.php b/mod_form.php
index 5a831b318577b6524d412e22d9aae1bf1b7af465..cf4f7fd94375fea90a074517ecb8c18cc40b93ec 100644
--- a/mod_form.php
+++ b/mod_form.php
@@ -65,7 +65,8 @@ class mod_pdfannotator_mod_form extends moodleform_mod {
         $filemanageroptions['maxfiles'] = 1; // Upload only one file.
         $filemanageroptions['mainfile'] = true;
 
-        $mform->addElement('filemanager', 'files', get_string('setting_fileupload', 'pdfannotator'), null, $filemanageroptions); // Params: 1. type of the element, 2. (html) elementname, 3. label.
+        $mform->addElement('filemanager', 'files', get_string('setting_fileupload', 'pdfannotator'), null,
+            $filemanageroptions); // Params: 1. type of the element, 2. (html) elementname, 3. label.
         $mform->addHelpButton('files', 'setting_fileupload', 'pdfannotator');
 
         $mform->addElement('advcheckbox', 'usevotes', get_string('setting_usevotes', 'pdfannotator'),
@@ -87,22 +88,26 @@ class mod_pdfannotator_mod_form extends moodleform_mod {
         $mform->addHelpButton('use_studentdrawing', 'setting_use_studentdrawing', 'pdfannotator');
 
         // XXX second checkbox or change to select.
-        $mform->addElement('advcheckbox', 'useprint', get_string('setting_useprint_document', 'pdfannotator'), get_string('useprint', 'pdfannotator'), null, array(0, 1));
+        $mform->addElement('advcheckbox', 'useprint', get_string('setting_useprint_document', 'pdfannotator'),
+            get_string('useprint', 'pdfannotator'), null, array(0, 1));
         $mform->setType('useprint', PARAM_BOOL);
         $mform->setDefault('useprint', $config->useprint);
         $mform->addHelpButton('useprint', 'setting_useprint_document', 'pdfannotator');
 
-        $mform->addElement('advcheckbox', 'useprintcomments', get_string('setting_useprint_comments', 'pdfannotator'), get_string('useprint_comments', 'pdfannotator'), null, array(0, 1));
+        $mform->addElement('advcheckbox', 'useprintcomments', get_string('setting_useprint_comments', 'pdfannotator'),
+            get_string('useprint_comments', 'pdfannotator'), null, array(0, 1));
         $mform->setType('useprintcomments', PARAM_BOOL);
         $mform->setDefault('useprintcomments', $config->useprintcomments);
         $mform->addHelpButton('useprintcomments', 'setting_useprint_comments', 'pdfannotator');
 
-        $mform->addElement('advcheckbox', 'useprivatecomments', get_string('setting_use_private_comments', 'pdfannotator'), get_string('use_private_comments', 'pdfannotator'), null, array(0, 1));
+        $mform->addElement('advcheckbox', 'useprivatecomments', get_string('setting_use_private_comments', 'pdfannotator'),
+            get_string('use_private_comments', 'pdfannotator'), null, array(0, 1));
         $mform->setType('useprivatecomments', PARAM_BOOL);
         $mform->setDefault('useprivatecomments', $config->use_private_comments);
         $mform->addHelpButton('useprivatecomments', 'setting_use_private_comments', 'pdfannotator');
 
-        $mform->addElement('advcheckbox', 'useprotectedcomments', get_string('setting_use_protected_comments', 'pdfannotator'), get_string('use_protected_comments', 'pdfannotator'), null, array(0, 1));
+        $mform->addElement('advcheckbox', 'useprotectedcomments', get_string('setting_use_protected_comments', 'pdfannotator'),
+            get_string('use_protected_comments', 'pdfannotator'), null, array(0, 1));
         $mform->setType('useprotectedcomments', PARAM_BOOL);
         $mform->setDefault('useprotectedcomments', $config->use_protected_comments);
         $mform->addHelpButton('useprotectedcomments', 'setting_use_protected_comments', 'pdfannotator');
diff --git a/model/annotation.class.php b/model/annotation.class.php
index 0eebb9089d62cadf1061806bb5f5a3d47533cc4e..fb416f45a29c60556da8efd58ccc8b7b8acd9456 100644
--- a/model/annotation.class.php
+++ b/model/annotation.class.php
@@ -22,7 +22,7 @@
  *
  * @package   mod_pdfannotator
  * @copyright 2018 RWTH Aachen (see README.md)
- * @author   Rabea de Groot, Anna Heynkes and Friederike Schwager
+ * @author    Rabea de Groot, Anna Heynkes and Friederike Schwager
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  *
  */
@@ -163,7 +163,8 @@ class pdfannotator_annotation {
         } else if (($author !== $userid) || !$deleteown) {
             $result[] = false;
             $result[] = get_string('onlyDeleteOwnAnnotations', 'pdfannotator');
-        } else if ($DB->record_exists_select('pdfannotator_comments', "annotationid = ? AND userid != ?", [$annotation->id, $userid])) { // Check whether other people have commented this annotation.)
+        } else if ($DB->record_exists_select('pdfannotator_comments', "annotationid = ? AND userid != ?",
+            [$annotation->id, $userid])) { // Check whether other people have commented this annotation.
             $result[] = false;
             $result[] = get_string('onlyDeleteUncommentedPosts', 'pdfannotator');
         } else {
@@ -191,7 +192,8 @@ class pdfannotator_annotation {
         }
         if (!$editownpost || $USER->id != self::get_author($annotationid)) {
             return false;
-        } else if ($DB->record_exists_select('pdfannotator_comments', "annotationid = ? AND userid != ?", array($annotationid, $USER->id))) {
+        } else if ($DB->record_exists_select('pdfannotator_comments', "annotationid = ? AND userid != ?",
+            array($annotationid, $USER->id))) {
             // Annotation was answered by other users.
             return false;
         }
diff --git a/model/comment.class.php b/model/comment.class.php
index df5dd1f1d3f396439e54a3e0769af4de314eafe3..b282c6b31cc66c444e17a36245b3fae0c7ba89c7 100644
--- a/model/comment.class.php
+++ b/model/comment.class.php
@@ -16,7 +16,7 @@
 /**
  * @package   mod_pdfannotator
  * @copyright 2018 RWTH Aachen (see README.md)
- * @author   Rabea de Groot, Anna Heynkes and Friederike Schwager
+ * @author    Rabea de Groot, Anna Heynkes and Friederike Schwager
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  *
  */
@@ -109,16 +109,19 @@ class pdfannotator_comment {
                     '&annoid=' . $annotationid . '&commid=' . $commentuuid;
 
                 $messagetext = new stdClass();
-                $messagetext->text = pdfannotator_format_notification_message_text($course, $cm, $context, get_string('modulename', 'pdfannotator'), $modulename, $question, 'newquestion');
+                $messagetext->text = pdfannotator_format_notification_message_text($course, $cm, $context,
+                    get_string('modulename', 'pdfannotator'), $modulename, $question, 'newquestion');
                 $messagetext->url = $question->urltoanswer;
                 foreach ($recipients as $recipient) {
-                    if (!pdfannotator_can_see_comment($datarecord, $context) ){
+                    if (!pdfannotator_can_see_comment($datarecord, $context)) {
                         continue;
                     }
                     if ($recipient->id == $USER->id) {
                         continue;
                     }
-                    $messagetext->html = pdfannotator_format_notification_message_html($course, $cm, $context, get_string('modulename', 'pdfannotator'), $modulename, $question, 'newquestion', $recipient->id);
+                    $messagetext->html = pdfannotator_format_notification_message_html($course, $cm, $context,
+                        get_string('modulename', 'pdfannotator'), $modulename, $question, 'newquestion',
+                        $recipient->id);
                     $messageid = pdfannotator_notify_manager($recipient, $course, $cm, 'newquestion', $messagetext, $anonymous);
                 }
 
@@ -143,10 +146,12 @@ class pdfannotator_comment {
         global $DB, $USER;
 
         // Get the ids and text content of all comments attached to this annotation/highlight.
-        $sql = "SELECT c.id, c.content, c.userid, c.visibility, c.isquestion, c.isdeleted, c.ishidden, c.timecreated, c.timemodified, c.modifiedby, c.solved, c.annotationid, SUM(vote) AS votes "
+        $sql = "SELECT c.id, c.content, c.userid, c.visibility, c.isquestion, c.isdeleted, c.ishidden, c.timecreated, "
+                . "c.timemodified, c.modifiedby, c.solved, c.annotationid, SUM(vote) AS votes "
                 . "FROM {pdfannotator_comments} c LEFT JOIN {pdfannotator_votes} v"
                 . " ON c.id=v.commentid WHERE annotationid = ?"
-                . " GROUP BY c.id, c.content, c.userid, c.visibility, c.isquestion, c.isdeleted, c.ishidden, c.timecreated, c.timemodified, c.modifiedby, c.solved, c.annotationid"
+                . " GROUP BY c.id, c.content, c.userid, c.visibility, c.isquestion, c.isdeleted, c.ishidden, c.timecreated, "
+                . "c.timemodified, c.modifiedby, c.solved, c.annotationid"
                 . " ORDER BY c.timecreated";
         $a = array();
         $a[] = $annotationid;
@@ -466,7 +471,7 @@ class pdfannotator_comment {
         if ($DB->record_exists('pdfannotator_subscriptions', array('annotationid' => $annotationid, 'userid' => $USER->id))) {
             return false;
         }
-        
+
         $comment = $DB->get_record('pdfannotator_comments', array('annotationid' => $annotationid, 'isquestion' => '1'));
         if (!pdfannotator_can_see_comment($comment, $context)) {
             return false;
@@ -476,7 +481,6 @@ class pdfannotator_comment {
         $datarecord->annotationid = $annotationid;
         $datarecord->userid = $USER->id;
 
-
         $subscriptionid = $DB->insert_record('pdfannotator_subscriptions', $datarecord, $returnid = true);
         return $subscriptionid;
     }
diff --git a/renderer.php b/renderer.php
index 113be11088b2f731f0c62d4bc8a30ae753d2a11c..4174c281282b3016a5630276d895561604e35c74 100644
--- a/renderer.php
+++ b/renderer.php
@@ -17,7 +17,7 @@
 /**
  * @package   mod_pdfannotator
  * @copyright 2018 RWTH Aachen (see README.md)
- * @author   Rabea de Groot and Anna Heynkes
+ * @author    Rabea de Groot and Anna Heynkes
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  *
  */
diff --git a/version.php b/version.php
index 3b233a9e38179dae4029ede35208f838b30eded1..93bb2d721e31179fec6d3307cade2c3c8cb1c83a 100644
--- a/version.php
+++ b/version.php
@@ -13,6 +13,7 @@
 //
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
 /**
  * Version information for mod/pdfannotator
  *
diff --git a/view.php b/view.php
index 93409b6a5355927ca1289b20835160313103ddf8..d51af8fb53f39b935873a9d655f7e185b8ec472c 100644
--- a/view.php
+++ b/view.php
@@ -16,7 +16,7 @@
 /**
  * @package   mod_pdfannotator
  * @copyright 2018 RWTH Aachen (see README.md)
- * @author   Ahmad Obeid, Anna Heynkes
+ * @author    Ahmad Obeid, Anna Heynkes
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 require('../../config.php');