Documentation update

[SVN r52091]

doc/error_info.html

@@ -61,6 +61,7 @@ typedef boost::<span class="RenoLink"><a href="error_info.html">error_info</a></
 </a><a href="exception_operator_shl.html">exception/operator&lt;&lt;<br/>
 </a><a href="get_error_info.html">get_error_info<br/>
 </a><a href="tutorial_enable_error_info.html">Integrating Boost Exception in Existing Exception Class Hierarchies<br/>
+</a><a href="motivation.html">Motivation<br/>
 </a><a href="tuple_operator_shl.html">tuple/operator&lt;&lt;<br/>
 </a></div>
 </div>