correct typo

git-svn-id: svn+ssh://svn.internal.sanger.ac.uk/repos/svn/pathsoft/artemis/trunk@9919 ee4ac58c-ac51-4696-9907-e4b3aa274f04

docs/options_menu.sgml

@@ -41,6 +41,15 @@ This is an advanced option for sites that have set up the ability to
 submit searches via SSH to another machine.
     </PARA>
   </SECT3>
+
+  <SECT3 ID="BLACK-BELT-MODE">
+  <TITLE>Black Belt Mode</TITLE>
+    <PARA>
+This is an advanced option that can be used to turn off warning message. This
+options is displayed if the java property (black_belt_mode) is specified on 
+opening up &prog;, i.e. art -Dblack_belt_mode=yes.
+    </PARA>
+  </SECT3>
  
   <SECT3 ID="LAUNCH-WINDOW-OPTIONS-HIGHLIGHTACTIVE">
     <TITLE>Highlight Active Entry</TITLE>