Minor - format code + add message

main/group/group.php

@@ -77,6 +77,10 @@ if (isset($_GET['action']) && $is_allowed_in_course) {
                 Display::addFlash(Display::return_message(get_lang('GroupNowMember')));
                 header("Location: $currentUrl");
                 exit;
+            } else {
+                Display::addFlash(Display::return_message(get_lang('Error')));
+                header("Location: $currentUrl");
+                exit;
             }
             break;
         case 'self_unreg':

main/group/group_edit.php

@@ -172,7 +172,14 @@ foreach ($complete_user_list as $index => $user) {
      }
 }
 
-$group_members_element = $form->addElement('advmultiselect', 'group_members', get_lang('GroupMembers'), $possible_users, 'style="width: 280px;"');
+$group_members_element = $form->addElement(
+    'advmultiselect',
+    'group_members',
+    get_lang('GroupMembers'),
+    $possible_users,
+    'style="width: 280px;"'
+);
+
 $form->addFormRule('check_group_members');
 
 // Members per group

main/group/group_space.php

@@ -345,6 +345,7 @@ $my_gidreq = isset($_GET['gidReq']) ? Security::remove_XSS($_GET['gidReq']) : ''
 $parameters = array('cidReq' => $my_cidreq, 'origin'=> $my_origin, 'gidReq' => $my_gidreq);
 $table->set_additional_parameters($parameters);
 $table->set_header(0, '');
+
 if (api_is_western_name_order()) {
     $table->set_header(1, get_lang('FirstName'));
     $table->set_header(2, get_lang('LastName'));