Remove useless commands in chap6 flex

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@11833 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter06/flex.xml

@@ -41,17 +41,20 @@
   <sect2 role="installation">
     <title>Installation of Flex</title>
 
+<!--
     <para>First, fix a problem introduced with glibc-2.26:</para>
 
 <screen><userinput remap="pre">sed -i "/math.h/a #include &lt;malloc.h&gt;" src/flexdef.h</userinput></screen>
 
     <para>The build procedure assumes the <application>help2man</application>
-    program is available to create a man page from the executable --help option.
+    program is available to create a man page from the executable - -help option.
     This is not present, so we use an environment variable to skip this process.
-    Now, prepare Flex for compilation:</para>
+    Now, prepare Flex for compilation:</para> -->
 
-<screen><userinput remap="configure">HELP2MAN=/tools/bin/true \
-./configure --prefix=/usr --docdir=/usr/share/doc/flex-&flex-version;</userinput></screen>
+    <para>Prepare Flex for compilation:</para>
+
+<!-- <screen><userinput remap="configure">HELP2MAN=/tools/bin/true \ -->
+<screen><userinput remap="configure">./configure --prefix=/usr --docdir=/usr/share/doc/flex-&flex-version;</userinput></screen>
 
     <para>Compile the package:</para>