[editorial] HTML spec style switcher

a few months back, thanks to WG member Mallory AKA @stommepoes), there is a
feature was added to the HTML spec to hide implementation specific content,
so web authors/developers can have a view the content most relevant to
their needs.

The 'developer view' style switcher can be operated via a button (top right
of view port)

What it does, essentially, is apply CSS display:none style to any element
that has a class="impl".

It also reduces limits the number of characters per line to take into
account WCAG 2.0 advice on line length.

Note: If a user follows a link while in developer view, that points to
content that has class="impl" the developer view is disabled.

any comments/feedback on this feature are welcome
--

Regards

SteveF
HTML 5.1 <http://www.w3.org/html/wg/drafts/html/master/>