Fixed some "sub class" to "subclass"

Author: guidolodetti

src/Facebook/FacebookResponse.php

@@ -259,7 +259,7 @@ public function decodeBody()
     /**
      * Instantiate a new GraphObject from response.
      *
-     * @param string|null $subclassName The GraphNode sub class to cast to.
+     * @param string|null $subclassName The GraphNode subclass to cast to.
      *
      * @return \Facebook\GraphNodes\GraphObject
      *
@@ -276,7 +276,7 @@ public function getGraphObject($subclassName = null)
     /**
      * Instantiate a new GraphNode from response.
      *
-     * @param string|null $subclassName The GraphNode sub class to cast to.
+     * @param string|null $subclassName The GraphNode subclass to cast to.
      *
      * @return \Facebook\GraphNodes\GraphNode
      *
@@ -376,7 +376,7 @@ public function getGraphGroup()
     /**
      * Instantiate a new GraphList from response.
      *
-     * @param string|null $subclassName The GraphNode sub class to cast list items to.
+     * @param string|null $subclassName The GraphNode subclass to cast list items to.
      * @param boolean     $auto_prefix  Toggle to auto-prefix the subclass name.
      *
      * @return \Facebook\GraphNodes\GraphList
@@ -394,7 +394,7 @@ public function getGraphList($subclassName = null, $auto_prefix = true)
     /**
      * Instantiate a new GraphEdge from response.
      *
-     * @param string|null $subclassName The GraphNode sub class to cast list items to.
+     * @param string|null $subclassName The GraphNode subclass to cast list items to.
      * @param boolean     $auto_prefix  Toggle to auto-prefix the subclass name.
      *
      * @return \Facebook\GraphNodes\GraphEdge