Merge pull request cplusplus#54 from cplusplus/jwakely-patch-1

[iterator.ostream.joiner.ops] Remove redundant parentheses

Author: jyasskin

iterator.html

@@ -105,7 +105,7 @@ <h1><code>ostream_joiner</code> operations</h1>
   *out_stream &lt;&lt; delim;
 first_element = false;
 *out_stream &lt;&lt; value;
-return (*this);</code></pre>
+return *this;</code></pre>
         </cxx-effects>
       </cxx-function>