Sortable: Whitespace fixed

Mistake in whitespace made the CI tests fail.

Author: CBenni

ui/widgets/sortable.js

@@ -82,7 +82,7 @@ return $.widget( "ui.sortable", $.ui.mouse, {
 	},
 
 	_isFloating: function( item ) {
-		return ( /left|right/ ).test( item.css( "float" ) ) || ( /inline|table-cell/ ).test( item.css( "display" ) ) || ( /flex/ ).test( this.element.css("display") );
+		return ( /left|right/ ).test( item.css( "float" ) ) || ( /inline|table-cell/ ).test( item.css( "display" ) ) || ( /flex/ ).test( this.element.css( "display" ) );
 	},
 
 	_create: function() {