Fix #12690. Avoid use of UTF-8 chars in final files.

Author: dmethvin

src/core.js

@@ -605,7 +605,8 @@ jQuery.extend({
 	},
 
 	// Use native String.trim function wherever possible
-	trim: core_trim && !core_trim.call("\uFEFF\xA0") ?
+	// Uglify converts escapes to UTF-8; this circumvents (#12690)
+	trim: core_trim && !core_trim.call( String.fromCharCode( 0xFEFF, 0xA0 ) ) ?
 		function( text ) {
 			return text == null ?
 				"" :

src/event.js

@@ -603,7 +603,7 @@ jQuery.removeEvent = document.removeEventListener ?
 
 		if ( elem.detachEvent ) {
 
-			// #8545, #7054, preventing memory leaks for custom events in IE6-8 –
+			// #8545, #7054, preventing memory leaks for custom events in IE6-8
 			// detachEvent needed property on element, by name of that event, to properly expose it to GC
 			if ( typeof elem[ name ] === "undefined" ) {
 				elem[ name ] = null;