Change "IN/NOT IN" to "IN / NOT IN" for clarity, both branches.

HISTORY

@@ -10,7 +10,7 @@
                                       
    Major changes in this release:
    
-   IN/NOT IN subqueries are now much more efficient
+   IN / NOT IN subqueries are now much more efficient
           In previous releases, IN/NOT IN subqueries were joined to the
           upper query by sequentially scanning the subquery looking for a
           match. The 7.4 code uses the same sophisticated techniques used

doc/src/sgml/release.sgml

 <!--
-$Header: /cvsroot/pgsql/doc/src/sgml/release.sgml,v 1.243 2003/11/16 03:23:48 tgl Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/release.sgml,v 1.244 2003/11/17 04:50:56 momjian Exp $
 -->
 
 <appendix id="release">
@@ -22,7 +22,7 @@ $Header: /cvsroot/pgsql/doc/src/sgml/release.sgml,v 1.243 2003/11/16 03:23:48 tg
     <variablelist>
      <varlistentry>
       <term>
-       <literal>IN</literal>/<literal>NOT IN</literal> subqueries are
+       <literal>IN</literal> / <literal>NOT IN</literal> subqueries are
        now much more efficient
       </term>