doc/go1.html: style tweak for expvar notes.

R=r
CC=golang-dev
https://golang.org/cl/5608061

doc/go1.html

@@ -927,7 +927,7 @@ and
 <p>
 <em>Updating</em>:
 Most code using <code>expvar</code> will not need changing. The rare code that used
-<code>Iter</code> can be updated to pass a closure to Do to achieve the same effect.
+<code>Iter</code> can be updated to pass a closure to <code>Do</code> to achieve the same effect.
 </p>
 
 <h3 id="flag">The flag package</h3>

doc/go1.tmpl

@@ -831,7 +831,7 @@ and
 <p>
 <em>Updating</em>:
 Most code using <code>expvar</code> will not need changing. The rare code that used
-<code>Iter</code> can be updated to pass a closure to Do to achieve the same effect.
+<code>Iter</code> can be updated to pass a closure to <code>Do</code> to achieve the same effect.
 </p>
 
 <h3 id="flag">The flag package</h3>