Switch to side-by-side view

--- a/src/doc/user/usermanual.html
+++ b/src/doc/user/usermanual.html
@@ -10,7 +10,7 @@
   <link rel="stylesheet" type="text/css" href="docbook-xsl.css">
   <meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
   <meta name="description" content=
-  "Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license can be found at the following location: GNU web site. This document introduces full text search notions and describes the installation and use of the Recoll application. This version describes Recoll 1.23.">
+  "Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license can be found at the following location: GNU web site. This document introduces full text search notions and describes the installation and use of the Recoll application. This version describes Recoll 1.24.">
 </head>
 <body bgcolor="white" text="black" link="#0000FF" vlink="#840084"
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@@ -53,7 +53,7 @@
             and describes the installation and use of the
             <span class="application">Recoll</span> application.
             This version describes <span class=
-            "application">Recoll</span> 1.23.</p>
+            "application">Recoll</span> 1.24.</p>
           </div>
         </div>
       </div>
@@ -434,7 +434,7 @@
       <p>This document introduces full text search notions and
       describes the installation and use of the <span class=
       "application">Recoll</span> application. It is updated for
-      <span class="application">Recoll</span> 1.23.</p>
+      <span class="application">Recoll</span> 1.24.</p>
       <p><span class="application">Recoll</span> was for a long
       time dedicated to Unix-like systems. It was only lately
       (2015) ported to <span class="application">MS-Windows</span>.