Fix statement about archive handling in KrViewer

doc/viewer-editor.docbook

@@ -96,9 +96,9 @@
       <listitem>
         <para>
         <userinput>
-          <command>file:/</command>
+          <command>tar:/</command>
 	  <replaceable>/home/frank/archive.tar.gz/</replaceable>
-        </userinput>views a
+        </userinput>opens content browser window for the
         <literal role="extension">tar.gz</literal> archive.</para>
       </listitem>
     </itemizedlist></para>