Dialog demo: syntax error, errant single quote from last style guide update. Fixed #6074 - Dialog: demo of modal form broken

Author: rdworth

demos/dialog/modal-form.html

@@ -77,7 +77,7 @@
 			buttons: {
 				"Create an account": function() {
 					var bValid = true;
-					allFields.removeClass( "ui-state-error' );
+					allFields.removeClass( "ui-state-error" );
 
 					bValid = bValid && checkLength( name, "username", 3, 16 );
 					bValid = bValid && checkLength( email, "email", 6, 80 );