Reverted a change commited by error.

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@7947 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter05/chapter05.xml

@@ -33,7 +33,7 @@
   <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="gettext.xml"/>
   <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="grep.xml"/>
   <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="gzip.xml"/>
-  <!--<xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="m4.xml"/>-->
+  <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="m4.xml"/>
   <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="make.xml"/>
   <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="patch.xml"/>
   <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="perl.xml"/>