Tweak docs on helper override of updateMatrixWorld

docs/api/helpers/Box3Helper.html

@@ -52,8 +52,9 @@
 
 		<h3>[method:void updateMatrixWorld]( force )</h3>
 		<div>
-			Overridden to also update the wireframe box to the extent of the passed
-			[page:Box3Helper.box].
+			This overrides the method in the base [page:Object3D] class so that it
+			also updates the wireframe box to the extent of the [page:Box3Helper.box .box]
+			property.
 		</div>
 
 		<h2>Source</h2>

docs/api/helpers/PlaneHelper.html

@@ -53,8 +53,9 @@
 
 		<h3>[method:void updateMatrixWorld]( force )</h3>
 		<div>
-			Overridden to also update the helper size and location according to passed
-			[page:PlaneHelper.plane] and the [page:PlaneHelper.size] property.
+			This overrides the method in the base [page:Object3D] class so that it also
+			updates the helper object according to the [page:PlaneHelper.plane .plane] and
+			[page:PlaneHelper.size .size] properties.
 		</div>
 
 		<h2>Source</h2>