Fix a typo

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@11677 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter06/python.xml

@@ -83,7 +83,7 @@
 
 <screen><userinput remap="make">make</userinput></screen>
 
-    <para>The test suite requires TK and and X Windows session and cannot
+    <para>The test suite requires TK and X Windows session and cannot
     be run until Python 3 is reinstalled in BLFS.</para>
 
     <para>Install the package:</para>