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diff --git a/chapter04/aboutlfs.xml b/chapter04/aboutlfs.xml
index d97f634b0..14aec3126 100644
--- a/chapter04/aboutlfs.xml
+++ b/chapter04/aboutlfs.xml
@@ -1,35 +1,39 @@
<?xml version="1.0" encoding="ISO-8859-1"?>
-<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN" "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
+<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
+ "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
<!ENTITY % general-entities SYSTEM "../general.ent">
%general-entities;
]>
+
<sect1 id="prepare-aboutlfs">
-<title>About $LFS</title>
-<?dbhtml filename="aboutlfs.html"?>
+ <?dbhtml filename="aboutlfs.html"?>
+
+ <title>About $LFS</title>
-<para>Throughout this book, the environment variable <envar>LFS</envar> will
-be used several times. It is paramount that this variable is always defined.
-It should be set to the mount point chosen for the LFS partition.
-Check that the <envar>LFS</envar> variable is set up properly with:</para>
+ <para>Throughout this book, the environment variable <envar>LFS</envar> will
+ be used several times. It is paramount that this variable is always defined.
+ It should be set to the mount point chosen for the LFS partition.
+ Check that the <envar>LFS</envar> variable is set up properly with:</para>
<screen role="nodump"><userinput>echo $LFS</userinput></screen>
-<para>Make sure the output shows the path to the LFS partition's mount
-point, which is <filename class="directory">/mnt/lfs</filename> if the
-provided example was followed. If the output is incorrect, the
-variable can be set with:</para>
+ <para>Make sure the output shows the path to the LFS partition's mount
+ point, which is <filename class="directory">/mnt/lfs</filename> if the
+ provided example was followed. If the output is incorrect, the
+ variable can be set with:</para>
<screen role="nodump"><userinput>export LFS=/mnt/lfs</userinput></screen>
-<para>Having this variable set is beneficial in that commands such as
-<command>mkdir $LFS/tools</command> can be typed literally. The shell
-will automatically replace <quote>$LFS</quote> with
-<quote>/mnt/lfs</quote> (or whatever the variable was set to) when it
-processes the command line.</para>
+ <para>Having this variable set is beneficial in that commands such as
+ <command>mkdir $LFS/tools</command> can be typed literally. The shell
+ will automatically replace <quote>$LFS</quote> with
+ <quote>/mnt/lfs</quote> (or whatever the variable was set to) when it
+ processes the command line.</para>
-<para>Do not forget to check that <envar>$LFS</envar> is set whenever
-you leave and reenter the current working environment (as when doing a
-<quote>su</quote> to <emphasis>root</emphasis> or another user).</para>
+ <para>Do not forget to check that <envar>$LFS</envar> is set whenever
+ you leave and reenter the current working environment (as when doing a
+ <command>su</command> to <systemitem class="username">root</systemitem>
+ or another user).</para>
</sect1>