Added missing nodump attribute.

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@8128 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter07/symlinks.xml

@@ -76,7 +76,7 @@
     as follows (where <replaceable>mode</replaceable> is one of
     <quote>by-id</quote> or <quote>by-path</quote>):</para>
 
-<screen><userinput>sed -i -e 's/write_cd_rules/&amp; <replaceable>mode</replaceable>/' \
+<screen role="nodump"><userinput>sed -i -e 's/write_cd_rules/&amp; <replaceable>mode</replaceable>/' \
     /etc/udev/rules.d/75-cd-aliases-generator.rules</userinput></screen>
 
     <para>Note that it is not necessary to create the rules files or symlinks