Switch to side-by-side view

--- a/src/doc/user/usermanual.sgml
+++ b/src/doc/user/usermanual.sgml
@@ -1987,7 +1987,7 @@
         results on file location (Ex:
         <literal>dir:/home/me/somedir</literal>). <literal>-dir</literal>
         also works to find results out of the specified directory, only
-        after release 1.16.</para>
+        after release 1.15.8.</para>
         </listitem>
 
         <listitem><para><literal>date</literal> for searching or filtering