Issue when select 'name' attribute contains spaces and enclosed in round bracket

[bharathD29]

For example I created a form select using,

<select name="(Second level with_spaced_words)" tabindex="-1" >
	<option value="1000">Third level first entry</option>
	<option value="2000">Third level second entry</option>
	<option value="3000">Third level third entry</option>
</select>

Then I initialization select()

$(document).ready(function() {
	 $('select').select2();
});

on clicking the select now, the drop-down opens and it never closes.

then when I looked on the web browser console, Found the below error.

Uncaught SyntaxError: Invalid regular expression: /(^|\.)select2\.(?:.*\.|)select2-(Second(\.|$)/: Unterminated group
    at new RegExp (<anonymous>)
    at Object.remove (jquery.js:5024)
    at HTMLBodyElement.<anonymous> (jquery.js:5493)
    at Function.each (jquery.js:368)
    at jQuery.fn.init.each (jquery.js:157)
    at jQuery.fn.init.off (jquery.js:5492)
    at d._detachCloseHandler (select2.min.js:1)
    at e.<anonymous> (select2.min.js:1)
    at e.d.invoke (select2.min.js:1)
    at e.d.trigger (select2.min.js:1)

I tried to eliminate the spaces. The results are normal.

<select name="(Second_level_with_spaced_words)" tabindex="-1" >
	<option value="1000">Third level first entry</option>
	<option value="2000">Third level second entry</option>
	<option value="3000">Third level third entry</option>
</select>

NOTE: The issue occurs when the name value is having spaces and is enclosed in round brackets.
For Example: Refer to the fiddle

[stale]

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