So it is less becomes less ambiguous when we update languages and check
them via helloweb.

Before:

    Hello world at `/`  ; Thu Jun  9 11:10:36 2016  (go)

After

    Hello world at `/`  ; Thu Jun  9 11:10:36 2016  (go devel +d66cbec Mon Jul 18 15:52:45 2016 +0000))

/reviewed-by TrustMe