I was looking at jsfiddle's code and saw these lines:
I've never seen the
edit attr before. What does it do? I couldn't find any info on w3.org or google
I would bet it's just mistake on their part and the "edit" attribute should have been "content". Maybe you should send them a note and let them know.
Update: I just sent Piotr a note, letting him about it. I'll update my answer with his response (if any).
contentattributes - Wesley Murch 2012-04-03 22:05
edit attribute is not valid html:
Line 4, Column 33: there is no attribute "edit" <meta name="description" edit="mootools shell, easy test you snippets before … ✉
So this means that it is either used by jsfiddle itself to pass values onto their js, or by some web-crawlers that I do not know of.
I have checked google's crawler, but it doesn't mention any such attributes.