Some minor fixes to why.xml.

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@10746 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

prologue/why.xml

@@ -150,9 +150,8 @@
       <listitem>
         <para>Expat</para>
 
-        <para>This package contains programs for parsing XML.  It is
-        required for XML-Parser.
-        </para>
+        <para>This package contains a relatively small XML parsing library.  It
+        is required by the XML::Parser Perl module.</para>
       </listitem>
 
       <listitem>
@@ -234,9 +233,8 @@
       <listitem>
         <para>Gperf</para>
 
-        <para>This package a program that generates a perfect hash function 
-        from a key set.  It is required for Eudev.
-        </para>
+        <para>This package contains a program that generates a perfect hash
+        function from a key set. It is required for Eudev.</para>
       </listitem>
 
       <listitem>