Added support for comma-separated .is(), touched up the test cases. R…

…esolves #977.

src/jquery/coreTest.js

@@ -576,10 +576,10 @@ test("is(String)", function() {
 	ok( !$('#foo').is(undefined), 'Expected false for an invalid expression - undefined' );
 
 	// test is() with comma-seperated expressions
-	ok( $('#en').is('[@lang="en"],[@lang="de"]'), 'Check for lang attribute: Expecte en or de' );
-	ok( $('#en').is('[@lang="de"],[@lang="en"]'), 'Check for lang attribute: Expecte en or de' );
-	ok( $('#en').is('[@lang="en"] , [@lang="de"]'), 'Check for lang attribute: Expecte en or de' );
-	ok( $('#en').is('[@lang="de"] , [@lang="en"]'), 'Check for lang attribute: Expecte en or de' );
+	ok( $('#en').is('[@lang="en"],[@lang="de"]'), 'Comma-seperated; Check for lang attribute: Expect en or de' );
+	ok( $('#en').is('[@lang="de"],[@lang="en"]'), 'Comma-seperated; Check for lang attribute: Expect en or de' );
+	ok( $('#en').is('[@lang="en"] , [@lang="de"]'), 'Comma-seperated; Check for lang attribute: Expect en or de' );
+	ok( $('#en').is('[@lang="de"] , [@lang="en"]'), 'Comma-seperated; Check for lang attribute: Expect en or de' );
 });
 
 test("$.extend(Object, Object)", function() {

src/jquery/jquery.js

@@ -1041,7 +1041,7 @@ jQuery.fn = jQuery.prototype = {
 	 * @cat DOM/Traversing
 	 */
 	is: function(expr) {
-		return expr ? jQuery.filter(expr,this).r.length > 0 : false;
+		return expr ? jQuery.multiFilter(expr,this).length > 0 : false;
 	},
 
 	/**