Make the docs a little bit shorter so that the old form is still
documented without repeating information (and the new form is
emphasized). I also fixed a misplaced double quote in one of the
examples.
* Add support for hx-on:* attribute
* Use shorter XPath selector
* Add support for "hx-on::" shorthand
* Add note about mixing the two forms of `hx-on`
* hx-on: Added to Reference page, and revised docs, removed words.
* hx-on: Made first sample a <div> to showcase versatility.
* Minor revision.
* Minor revision.
* Fixed broken Locality of Behavior link.
