* $textbox.textSelection( 'encapsulateSelection', { pre: '<b>', post: '</b>' } );
* // Result: Textbox contains 'This is <b>bold</b>!', with cursor before the '!'
*/
* $textbox.textSelection( 'encapsulateSelection', { pre: '<b>', post: '</b>' } );
* // Result: Textbox contains 'This is <b>bold</b>!', with cursor before the '!'
*/