This has always been true, but we lost it from the spec
somewhere along the way, probably when we disallowed
the general 'pointer to anything sliceable' slice case.
R=gri
CC=golang-dev
https://golang.org/cl/
5437121
<h3 id="Slices">Slices</h3>
<p>
-For a string, array, or slice <code>a</code>, the primary expression
+For a string, array, pointer to array, or slice <code>a</code>, the primary expression
</p>
<pre>