Move lexical_cast into the correct place.

libs/libraries.htm

@@ -857,11 +857,11 @@ of arbitrary data for persistence and marshalling, from Robert Ramey</li>
 <h3><a name="String">String</a> and Text Processing</h3>
 
 <ul>
-    <li><a href="lexical_cast/index.html">lexical_cast</a> - <tt>lexical_cast</tt>
-      class template, from Kevlin Henney.</li>
     <li><a href="format/index.html">format</a> - Type-safe 'printf-like' format
     operations, from Samuel Krempp.</li>
     <li><a href="iostreams/doc/index.html">iostreams</a> - Framework for defining streams, stream buffers and i/o filters, from Jonathan Turkanis.</li>
+    <li><a href="lexical_cast/index.html">lexical_cast</a> - <tt>lexical_cast</tt>
+      class template, from Kevlin Henney.</li>
     <li><a href="locale/index.html">locale</a> - Provide localization and Unicode
     handling tools for C++, from Artyom Beilis</li>
     <li><a href="regex/index.html">regex</a> - Regular expression