Removed a </sect3>

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@394 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

appendixa/kbd-desc.xml

@@ -204,8 +204,6 @@ showkey examines the scancodes and keycodes sent by the keyboard.
 
 </sect3>
 
-</sect3>
-
 <sect3>
 <title>unicode_start</title>