Autocomplete: Use $.ui.autocomplete.escapeRegex in combobox demo; Fix…

…es #5436 Autocomplete: use $.ui.autocomplete.escapeRegex in combox demo

demos/autocomplete/combobox.html

@@ -33,7 +33,7 @@
 								if (!request.term || matcher.test(text))
 									return {
 										id: $(this).val(),
-										label: text.replace(new RegExp("(?![^&;]+;)(?!<[^<>]*)(" + request.term.replace(/([\^\$\(\)\[\]\{\}\*\.\+\?\|\\])/gi, "\\$1") + ")(?![^<>]*>)(?![^&;]+;)", "gi"), "<strong>$1</strong>"),
+										label: text.replace(new RegExp("(?![^&;]+;)(?!<[^<>]*)(" + $.ui.autocomplete.escapeRegex(request.term) + ")(?![^<>]*>)(?![^&;]+;)", "gi"), "<strong>$1</strong>"),
 										value: text
 									};
 							}));