text/template: fix range example.
text/template: fix range example.

R=r
CC=adg, gobot, golang-dev
http://codereview.appspot.com/6449096

Committer: Rob Pike <4dc7c9ec434ed06502767136789763ec11d2c4b7@golang.org>
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go