apply phpcbf formatting

Author: hans-thomas

src/Relations/MorphToMany.php

@@ -155,7 +155,7 @@ public function sync($ids, $detaching = true)
                 true => $this->parent->{$this->relatedPivotKey} ?: [],
                 false => $this->parent->{$this->relationName} ?: [],
             };
-            
+
             if ($current instanceof Collection) {
                 $current = $this->parseIds($current);
             }