Fix some coding guideline issues.

classes/structure.php

@@ -591,7 +591,7 @@ class mod_attendance_structure {
         $extrafields = get_extra_user_fields($this->context, $fields);
         $fields = array_merge($fields, $extrafields);
 
-        $userfields = user_picture::fields('u',$fields);
+        $userfields = user_picture::fields('u', $fields);
 
         if (empty($this->pageparams->sort)) {
             $this->pageparams->sort = ATT_SORT_DEFAULT;

renderer.php

@@ -968,7 +968,6 @@ class mod_attendance_renderer extends plugin_renderer_base {
 
         $rows[] = $row;
 
-
         foreach ($reportdata->users as $user) {
             $row = new html_table_row();
             $row->cells[] = $this->build_data_cell($this->user_picture($user));