fix(text selector): make quoted selector match by text nodes

[dgozman]

This change turns quoted match to be case-sensitive (as before),
but not strictly full-string for the whole element's text.

This is a fix for a case where element contains text nodes and child elements:

<div>text1<span>child node</span>text2</div>

We now match this div by text="text1" and text="text2".

[niranjan-borawake]

This change turns quoted match to be case-sensitive (as before),
but not strictly full-string for the whole element's text.

This is a fix for a case where element contains text nodes and child elements:

<div>text1<span>child node</span>text2</div>

We now match this div by text="text1" and text="text2".

Hello @dgozman ,

What's the recommended way to do strict full string search?

If I have -

<div>Hello World..!</div> <div>Hello</div>

What's the recommended way to select second div?
The way I chose was text=/^Hello$/

[ychaudhari]

I had element like this:

<h2>
	<span>Title:</span>
	&nbsp;
	<span>text</span>
</h2>

My selector await expect(page).toHaveSelector('"text"'); was working in 1.8.1 but breaking in 1.9.0 and 1.9.1