Provide auto-trim option for .text()

[AlistairB]

I am constantly writing code like this:

var myId = $.trim($(".some-element").text());

It would be nice to have a leaner way to do this. eg.

var myId = $(".some-element").text(true);

var myId = $(".some-element").textTrim(); //there isprobably a better name for this

[ajpiano]

If you do this a lot, write a utility function.

$.fn.textTrim = function() { 
return $.trim(this.text());
}

I don't think we should add this to core.

[rwaldron]

Second ajpiano