jQuery().wrapInner() prepends instead of wrapping when html structure contains text nodes

[jtate]

For example:

jQuery('p').wrapInner('<strong/>');

would work fine. However

jQuery('p').wrapInner('<strong> </strong>')

will produce html output that looks like:

<p><strong> </strong>INNER TEXT</p>

when it meets a paragraph element with the Text contents of "INNER TEXT".

[dmethvin]

The problem is this loop in wrapAll:

	while ( elem.firstChild )
		elem = elem.firstChild;

It's trying to find the deepest point in the wrapping nodes to know where to append the nodes in the jQuery object. However, if any of the firstChild nodes in the wrapper are text nodes, it won't work right. I've attached a patch that tries to find the leftmost non-text node.

[dmethvin]

​http://jsfiddle.net/dmethvin/MkUqm/