Removed trailing whitespace

Author: jb-lopez

reference/operator/book.xml

@@ -21,10 +21,8 @@
    Another example is creating an enhanced string class that has the multiplication
    operator overloaded to allow repeating the string a certain number of times.
   </para>
-
   <section>
    &reftitle.seealso;
-
   </section>
  </preface>
  <!-- }}} -->

reference/operator/setup.xml

@@ -3,7 +3,6 @@
 
 <chapter xml:id="operator.setup" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
  &reftitle.setup;
- 
  <section xml:id="operator.installation">
   &reftitle.install;
   <para>