doc: tweak phrasing in Go 1.5 release notes

Change-Id: I6bea045bb1cef15e6d9d3b4e6e6b4ae91f7bb941
Reviewed-on: https://go-review.googlesource.com/13345Reviewed-by: Rob Pike <r@golang.org>

doc/go1.5.html

@@ -815,7 +815,7 @@ method to discard data from the input.
 </li>
 
 <li>
-Also in the <a href="/pkg/bytes/"><code>bytes</code></a> package,
+In the <a href="/pkg/bytes/"><code>bytes</code></a> package,
 the <a href="/pkg/bytes/#Buffer"><code>Buffer</code></a> type
 now has a <a href="/pkg/bytes/#Buffer.Cap"><code>Cap</code></a> method
 that reports the number of bytes allocated within the buffer.