Index: chapter06/flex.xml
===================================================================
--- chapter06/flex.xml	(revision ca170329c9ab02a57921217477921a59d09a0dc6)
+++ chapter06/flex.xml	(revision 9e58b5a08c136c7e2678850643eb56737e6358e6)
@@ -1,70 +1,87 @@
 <?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="ch-system-flex" role="wrap">
-<title>Flex-&flex-version;</title>
-<?dbhtml filename="flex.html"?>
+  <?dbhtml filename="flex.html"?>
 
-<indexterm zone="ch-system-flex"><primary sortas="a-Flex">Flex</primary></indexterm>
+  <title>Flex-&flex-version;</title>
 
-<sect2 role="package"><title/>
-<para>The Flex package contains a utility for generating programs that
-recognize patterns in text.</para>
+  <indexterm zone="ch-system-flex">
+    <primary sortas="a-Flex">Flex</primary>
+  </indexterm>
 
-<segmentedlist>
-<segtitle>&buildtime;</segtitle>
-<segtitle>&diskspace;</segtitle>
-<seglistitem><seg>0.1 SBU</seg><seg>22.5 MB</seg></seglistitem>
-</segmentedlist>
+  <sect2 role="package">
+    <title/>
 
-<segmentedlist>
-<segtitle>&dependencies;</segtitle>
-<seglistitem><seg>Bash, Binutils, Bison, Coreutils, Diffutils,
-GCC, Gettext, Glibc, Grep, M4, Make, and Sed</seg></seglistitem>
-</segmentedlist>
-</sect2>
+    <para>The Flex package contains a utility for generating programs that
+    recognize patterns in text.</para>
 
-<sect2 role="installation">
-<title>Installation of Flex</title>
+    <segmentedlist>
+      <segtitle>&buildtime;</segtitle>
+      <segtitle>&diskspace;</segtitle>
 
-<para>Flex contains several known bugs. Fix these with the following patch:</para>
+      <seglistitem>
+        <seg>0.1 SBU</seg>
+        <seg>22.5 MB</seg>
+      </seglistitem>
+    </segmentedlist>
+
+    <segmentedlist>
+      <segtitle>&dependencies;</segtitle>
+
+      <seglistitem>
+        <seg>Bash, Binutils, Bison, Coreutils, Diffutils, GCC, Gettext,
+        Glibc, Grep, M4, Make, and Sed</seg>
+      </seglistitem>
+    </segmentedlist>
+
+  </sect2>
+
+  <sect2 role="installation">
+    <title>Installation of Flex</title>
+
+    <para>Flex contains several known bugs. Fix these with the following
+    patch:</para>
 
 <screen><userinput>patch -Np1 -i ../&flex-fixes-patch;</userinput></screen>
 
-<para>The GNU autotools detects that the Flex source code has been
-modified by the previous patch and tries to update the man page
-accordingly. This does not work correctly on many systems, and the
-default page is fine, so make sure it does not get regenerated:</para>
+    <para>The GNU autotools detects that the Flex source code has been
+    modified by the previous patch and tries to update the man page
+    accordingly. This does not work correctly on many systems, and the
+    default page is fine, so make sure it does not get regenerated:</para>
 
 <screen><userinput>touch doc/flex.1</userinput></screen>
 
-<para>Prepare Flex for compilation:</para>
+    <para>Prepare Flex for compilation:</para>
 
 <screen><userinput>./configure --prefix=/usr</userinput></screen>
 
-<para>Compile the package:</para>
+    <para>Compile the package:</para>
 
 <screen><userinput>make</userinput></screen>
 
-<para>To test the results, issue:
-<userinput>make check</userinput>.</para>
+    <para>To test the results, issue:
+    <userinput>make check</userinput>.</para>
 
-<para>Install the package:</para>
+    <para>Install the package:</para>
 
 <screen><userinput>make install</userinput></screen>
 
-<para>There are some packages that expect to find the
-<filename class="libraryfile">lex</filename> library in <filename
-class="directory">/usr/lib</filename>. Create a symlink to account for
-this:</para>
+    <para>There are some packages that expect to find the
+    <filename class="libraryfile">lex</filename> library in <filename
+    class="directory">/usr/lib</filename>. Create a symlink to account for
+    this:</para>
 
 <screen><userinput>ln -sv libfl.a /usr/lib/libl.a</userinput></screen>
 
-<para>A few programs do not know about <command>flex</command> yet and
-try to run its predecessor, <command>lex</command>. To support those
-programs, create a wrapper script named <filename>lex</filename> that
-calls <filename>flex</filename> in <command>lex</command> emulation mode:</para>
+    <para>A few programs do not know about <command>flex</command> yet and
+    try to run its predecessor, <command>lex</command>. To support those
+    programs, create a wrapper script named <filename>lex</filename> that
+    calls <filename>flex</filename> in <command>lex</command> emulation
+    mode:</para>
 
 <screen><userinput>cat &gt; /usr/bin/lex &lt;&lt; "EOF"
@@ -78,51 +95,60 @@
 chmod -v 755 /usr/bin/lex</userinput></screen>
 
-</sect2>
+  </sect2>
 
+  <sect2 id="contents-flex" role="content">
+    <title>Contents of Flex</title>
 
-<sect2 id="contents-flex" role="content"><title>Contents of Flex</title>
+    <segmentedlist>
+      <segtitle>Installed programs</segtitle>
+      <segtitle>Installed library</segtitle>
 
-<segmentedlist>
-<segtitle>Installed programs</segtitle>
-<segtitle>Installed library</segtitle>
-<seglistitem><seg>flex and lex</seg>
-<seg>libfl.a</seg></seglistitem>
-</segmentedlist>
+      <seglistitem>
+        <seg>flex and lex</seg>
+        <seg>libfl.a</seg>
+      </seglistitem>
+    </segmentedlist>
 
-<variablelist><bridgehead renderas="sect3">Short Descriptions</bridgehead>
-<?dbfo list-presentation="list"?>
-<?dbhtml list-presentation="table"?>
+    <variablelist>
+      <bridgehead renderas="sect3">Short Descriptions</bridgehead>
+      <?dbfo list-presentation="list"?>
+      <?dbhtml list-presentation="table"?>
 
-<varlistentry id="flex">
-<term><command>flex</command></term>
-<listitem>
-<para>A tool for generating programs that recognize patterns in text;
-it allows for the versatility to specify the rules for
-pattern-finding, eradicating the need to develop a specialized
-program</para>
-<indexterm zone="ch-system-flex flex"><primary sortas="b-flex">flex</primary></indexterm>
-</listitem>
-</varlistentry>
+      <varlistentry id="flex">
+        <term><command>flex</command></term>
+        <listitem>
+          <para>A tool for generating programs that recognize patterns in text;
+          it allows for the versatility to specify the rules for pattern-finding,
+          eradicating the need to develop a specialized program</para>
+          <indexterm zone="ch-system-flex flex">
+            <primary sortas="b-flex">flex</primary>
+          </indexterm>
+        </listitem>
+      </varlistentry>
 
-<varlistentry id="lex">
-<term><command>lex</command></term>
-<listitem>
-<para>A script that runs <command>flex</command> in <command>lex</command>
-emulation mode</para>
-<indexterm zone="ch-system-flex lex"><primary sortas="b-lex">lex</primary></indexterm>
-</listitem>
-</varlistentry>
+      <varlistentry id="lex">
+        <term><command>lex</command></term>
+        <listitem>
+          <para>A script that runs <command>flex</command> in
+          <command>lex</command> emulation mode</para>
+          <indexterm zone="ch-system-flex lex">
+            <primary sortas="b-lex">lex</primary>
+          </indexterm>
+        </listitem>
+      </varlistentry>
 
-<varlistentry id="libfl.a">
-<term><filename class="libraryfile">libfl.a</filename></term>
-<listitem>
-<para>The <filename class="libraryfile">flex</filename> library</para>
-<indexterm zone="ch-system-flex libfl.a"><primary sortas="c-libfl.a">libfl.a</primary></indexterm>
-</listitem>
-</varlistentry>
-</variablelist>
+      <varlistentry id="libfl.a">
+        <term><filename class="libraryfile">libfl.a</filename></term>
+        <listitem>
+          <para>The <filename class="libraryfile">flex</filename> library</para>
+          <indexterm zone="ch-system-flex libfl.a">
+            <primary sortas="c-libfl.a">libfl.a</primary>
+          </indexterm>
+        </listitem>
+      </varlistentry>
 
-</sect2>
+    </variablelist>
+
+  </sect2>
 
 </sect1>
-
