Changed urlParseRE to ignore space at beginning. This is expected

behavior in browsers. This used to result in pages changing to
"%20destination.html" instead of the now "destination.html". Fixes issue #4882

js/jquery.mobile.navigation.js

@@ -38,7 +38,7 @@
 			//    [15]: ?msg=1234&type=unread
 			//    [16]: #msg-content
 			//
-			urlParseRE: /^(((([^:\/#\?]+:)?(?:\/\/((?:(([^:@\/#\?]+)(?:\:([^:@\/#\?]+))?)@)?(([^:\/#\?]+)(?:\:([0-9]+))?))?)?)?((\/?(?:[^\/\?#]+\/+)*)([^\?#]*)))?(\?[^#]+)?)(#.*)?/,
+			urlParseRE: /^\s*(((([^:\/#\?]+:)?(?:\/\/((?:(([^:@\/#\?]+)(?:\:([^:@\/#\?]+))?)@)?(([^:\/#\?]+)(?:\:([0-9]+))?))?)?)?((\/?(?:[^\/\?#]+\/+)*)([^\?#]*)))?(\?[^#]+)?)(#.*)?/,
 
 			//Parse a URL into a structure that allows easy access to
 			//all of the URL components by name.

tests/unit/navigation/navigation_core.js

@@ -535,4 +535,18 @@
 			}
 		]);
 	});
+
+	asyncTest( "external page is accessed correctly even if it has a space in the url", function(){
+		$.testHelper.pageSequence([
+			function(){
+				$.mobile.changePage( " external.html" );
+			},
+
+			function(){
+				ok( $.mobile.activePage.attr( "id" ), "external-test", "the correct page is loaded" );
+				start();
+			}
+		]);
+	});
+
 })(jQuery);