wiki/NaturalDocs says we should be using 'Return:' and not 'Returns:' so this patch is fixing that. Of course, in the process, I came across not a few instances where other ND related whitespace or typos were at odds with a peaceful, uniform OL codebase. No functional changes here, just makin' things pretty.

git-svn-id: http://svn.openlayers.org/trunk/openlayers@4109 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Control/Panel.js

@@ -82,7 +82,7 @@ OpenLayers.Control.Panel = OpenLayers.Class(OpenLayers.Control, {
     /**
      * Method: draw
      *
-     * Returns: {DOMElement}
+     * Return: {DOMElement}
      */    
     draw: function() {
         OpenLayers.Control.prototype.draw.apply(this, arguments);