Added missing 'allocator'

[SVN r9179]

more/generic_programming.html

@@ -238,7 +238,7 @@ void append_sequence(Container& c, Iterator start, Iterator finish)
 
     <p>A policies class is a template parameter used to transmit
     behaviors. An example from the standard library is <tt>std::<a
-    href="http://www.dinkumware.com/htm_cpl/memory.html#allocator"></a></tt>,
+    href="http://www.dinkumware.com/htm_cpl/memory.html#allocator">allocator</a></tt>,
     which supplies memory management behaviors to standard <a
     href="http://www.sgi.com/tech/stl/Container.html">containers</a>.