Taking a look at the documentation the paragraph saying:

The first button shows how an unqueued animation works. It expands the div out to 90% width while the font-size is increasing. Once the font-size change is complete, the border animation will begin. The second button starts a traditional chained animation, where each animation will start once the previous animation on the element has completed.

Is referring to the examples right below it, not the one above, if you take a look at the example below the paragraph it actually expands the div out to 90% width:

<script>
$( "#go1" ).on( "click", function() {
  $( "#block1" )
    .animate({
      width: "90%"
    }, {
      queue: false,
      duration: 3000
    })
    .animate({ fontSize: "24px" }, 1500 )
    .animate({ borderRightWidth: "15px" }, 1500 );
});
</script>

It might be a good thing to change the order of the paragraphs/examples for better clarity and/or just move the mentioned paragraph and position it below the "correct" example.

Probably appending "In the next example" i.e:

In the next example, the first button shows how an unqueued animation works. It expands the div out to 90% width while the font-size is increasing. Once the font-size change is complete, the border animation will begin. The second button starts a traditional chained animation, where each animation will start once the previous animation on the element has completed.

would increase clarity and remove the ambiguity of "is this text referring to the example above? or the one below?"

I don't think that's the correct approach; we'd have to add something like that to every single example.

I'd rather tweak the <example> definition to expand to something that will be clearer about the intent.

The <example> tag rendering is defined in grunt-jquery-content; it's an XSLT transform. Examples handling is here: https://github.com/jquery/grunt-jquery-content/blob/1abaf4b81c800f332880583e6d97b0ef6b2b44c0/tasks/jquery-xml/entries2html-base.xsl#L95-L113

Maybe we should have a header (h3?) for each example with the counter (Example 1, Example 2, etc.) which would separate them more clearly?

Yeah, sure, that would be a great change, I'll take a look at the files you mentioned and see if I can make the changes

Done @mgol PR Nº 95, I'll close my previous PR and I'm waiting for your approval.

This has been fixed and examples are more clearly separated now. Thanks to @aldimar-junior for the fix!