Merge pull request #12817 from mghini/patch-2

Update AxesHelper.html

docs/api/helpers/AxesHelper.html

@@ -35,7 +35,7 @@ scene.add( axesHelper );
 
 		<h3>[name]( [page:Number size] )</h3>
 		<div>
-		[page:Number size] -- (optional )size of the lines representing the axes. Default is *1*.
+		[page:Number size] -- (optional) size of the lines representing the axes. Default is *1*.
 		</div>
 
 		<h2>Properties</h2>