entity fix

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@452 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter06/chapter06.xml

@@ -1,7 +1,7 @@
 <chapter id="chapter06">
 <title>Installing basic system software</title>
 
-&c6troduction;
+&c6-introduction;
 &c6-aboutdebug;
 &c6-bashprofile;
 &c6-chroot;