Fix #toString() for event objects.

src/core/Base.js

@@ -41,7 +41,7 @@ this.Base = Base.inject(/** @lends Base# */{
 	toString: function() {
 		return '{ ' + Base.each(this, function(value, key) {
 			// Hide internal properties even if they are enumerable
-			if (key.charAt(0) != '_') {
+			if (!/^_/.test(key)) {
 				var type = typeof value;
 				this.push(key + ': ' + (type === 'number'
 						? Base.formatFloat(value)

src/ui/KeyEvent.js

@@ -57,10 +57,10 @@ var KeyEvent = this.KeyEvent = Event.extend(/** @lends KeyEvent# */{
 	 * @return {String} A string representation of the key event.
 	 */
 	toString: function() {
-		return '{ type: ' + this.type
-				+ ', key: ' + this.key
-				+ ', character: ' + this.character
-				+ ', modifiers: ' + this.getModifiers()
-				+ ' }';
+		return "{ type: '" + this.type
+				+ "', key: '" + this.key
+				+ "', character: '" + this.character
+				+ "', modifiers: " + this.getModifiers()
+				+ " }";
 	}
 });

src/ui/MouseEvent.js

@@ -67,8 +67,8 @@ var MouseEvent = this.MouseEvent = Event.extend(/** @lends MouseEvent# */{
 	 * @return {String} A string representation of the mouse event.
 	 */
 	toString: function() {
-		return '{ type: ' + this.type
-				+ ', point: ' + this.point
+		return "{ type: '" + this.type
+				+ "', point: " + this.point
 				+ ', target: ' + this.target
 				+ (this.delta ? ', delta: ' + this.delta : '')
 				+ ', modifiers: ' + this.getModifiers()