Fixed some invalid docbook (<para> is not allowed to be a child of

<part>).  This fixes one of the failures when building pdf docs with
fop 0.94.



[SVN r40046]

doc/src/boost.xml

@@ -731,17 +731,18 @@
 
   <part id="tools">
     <title>Boost Tools</title>
-    <para>
-      Boost developers, testers, and maintainers have developed various programs to 
-      help with the administration of the Boost Libraries. Like everything else about 
-      Boost, these tools are available in source form, and are part of the regular 
-      Boost distribution.
-    </para>
-    <para>
-      Users may find these tools useful when porting Boost libraries to a new platform, 
-      or for use with their own applications.
-    </para>
-
+    <partintro>
+      <para>
+        Boost developers, testers, and maintainers have developed various programs to 
+        help with the administration of the Boost Libraries. Like everything else about 
+        Boost, these tools are available in source form, and are part of the regular 
+        Boost distribution.
+      </para>
+      <para>
+        Users may find these tools useful when porting Boost libraries to a new platform, 
+        or for use with their own applications.
+      </para>
+    </partintro>
     <xi:include href="../../tools/boostbook/doc/boostbook.xml"/>
     <xi:include href="quickbook.xml"/>
     <xi:include href="bjam.xml"/>