HTML 5: Is it , , or ?

Question

I\'ve tried checking other answers, but I\'m still confused — especially after seeing W3schools HTML 5 reference.

I thought HTML 4.01 was supposed to \"allow\" singl

Answer 1

As many others have covered, both
and
are acceptable.

I guess the tradeoff is the better readability and backward compatibility of
versus sending one less character to the end users with
.

And since Google uses
so will I.

(Of course keep in mind that they might be serving me
because I'm using Chrome which they know supports it. In IE they might still be serving
)