go spec: fix up HTML glitches.
go spec: fix up HTML glitches.

Fixes issue 1786.

R=gri, adg
CC=golang-dev
http://codereview.appspot.com/4517043
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go