Fix huge allocation statistics.

doc/jemalloc.xml.in

@@ -1719,9 +1719,8 @@ malloc_conf = "xmalloc:true";]]></programlisting>
         </term>
         <listitem><para>Pointer to a counter that contains an approximate count
         of the current number of bytes in active pages.  The estimate may be
-        high, but never low, because each arena rounds up to the nearest
-        multiple of the chunk size when computing its contribution to the
-        counter.  Note that the <link
+        high, but never low, because each arena rounds up when computing its
+        contribution to the counter.  Note that the <link
         linkend="epoch"><mallctl>epoch</mallctl></link> mallctl has no bearing
         on this counter.  Furthermore, counter consistency is maintained via
         atomic operations, so it is necessary to use an atomic operation in