doc: Fix man page whitespace issues

Whitespace between tags is significant, and in some cases it creates
extra vertical space in man pages.  The fix is to remove some newlines
in the markup.

doc/src/sgml/ref/alter_publication.sgml

@@ -218,8 +218,7 @@ ALTER PUBLICATION sales_publication ADD ALL TABLES IN SCHEMA marketing, sales;
    <structname>production_publication</structname>:
 <programlisting>
 ALTER PUBLICATION production_publication ADD TABLE users, departments, ALL TABLES IN SCHEMA production;
-</programlisting>
-  </para>
+</programlisting></para>
  </refsect1>
 
  <refsect1>

doc/src/sgml/ref/alter_subscription.sgml

@@ -249,8 +249,7 @@ ALTER SUBSCRIPTION <replaceable class="parameter">name</replaceable> RENAME TO <
          </para>
         </listitem>
        </varlistentry>
-      </variablelist>
-     </para>
+      </variablelist></para>
     </listitem>
    </varlistentry>
 

doc/src/sgml/ref/alter_table.sgml

@@ -923,8 +923,7 @@ WITH ( MODULUS <replaceable class="parameter">numeric_literal</replaceable>, REM
         </para>
        </listitem>
       </varlistentry>
-     </variablelist>
-     </para>
+     </variablelist></para>
     </listitem>
    </varlistentry>
 

doc/src/sgml/ref/create_subscription.sgml

@@ -302,8 +302,7 @@ CREATE SUBSCRIPTION <replaceable class="parameter">subscription_name</replaceabl
          </para>
         </listitem>
        </varlistentry>
-      </variablelist>
-     </para>
+      </variablelist></para>
 
     </listitem>
    </varlistentry>

doc/src/sgml/ref/create_trigger.sgml

@@ -175,12 +175,10 @@ CREATE [ OR REPLACE ] [ CONSTRAINT ] TRIGGER <replaceable class="parameter">name
   </para>
 
   <para>
-   <indexterm>
-    <primary>trigger</primary>
-    <secondary>constraint trigger</secondary>
-   </indexterm>
    When the <literal>CONSTRAINT</literal> option is specified, this command creates a
-   <firstterm>constraint trigger</firstterm>.  This is the same as a regular trigger
+   <firstterm>constraint trigger</firstterm>.<indexterm><primary>trigger</primary>
+   <secondary>constraint trigger</secondary></indexterm>
+   This is the same as a regular trigger
    except that the timing of the trigger firing can be adjusted using
    <link linkend="sql-set-constraints"><command>SET CONSTRAINTS</command></link>.
    Constraint triggers must be <literal>AFTER ROW</literal> triggers on plain

doc/src/sgml/ref/drop_procedure.sgml

@@ -194,8 +194,7 @@ DROP PROCEDURE do_db_maintenance(text, text);  -- potentially ambiguous
    However, the last example would be ambiguous if there is also, say,
 <programlisting>
 CREATE PROCEDURE do_db_maintenance(IN target_schema text, IN options text) ...
-</programlisting>
-  </para>
+</programlisting></para>
  </refsect1>
 
  <refsect1 id="sql-dropprocedure-compatibility">

doc/src/sgml/ref/merge.sgml

@@ -472,11 +472,9 @@ MERGE <replaceable class="parameter">total_count</replaceable>
              the action's event type.
             </para>
            </listitem>
-          </orderedlist>
-         </para>
+          </orderedlist></para>
         </listitem>
-       </orderedlist>
-      </para>
+       </orderedlist></para>
      </listitem>
      <listitem>
       <para>

doc/src/sgml/ref/pg_basebackup.sgml

@@ -994,8 +994,7 @@ PostgreSQL documentation
    directory <filename>backup</filename>:
 <screen>
 <prompt>$</prompt> <userinput>pg_basebackup -D backup -Ft --compress=gzip:9</userinput>
-</screen>
-  </para>
+</screen></para>
 
  </refsect1>
 

doc/src/sgml/ref/pgbench.sgml

@@ -2459,11 +2459,9 @@ END;
   <para>
    Here is some example output with following options:
 <screen>
-pgbench --aggregate-interval=10 --time=20 --client=10 --log --rate=1000
---latency-limit=10 --failures-detailed --max-tries=10 test
-</screen>
+<userinput>pgbench --aggregate-interval=10 --time=20 --client=10 --log --rate=1000
+--latency-limit=10 --failures-detailed --max-tries=10 test</userinput>
 
-<screen>
 1649114136 5815 27552565 177846919143 1078 21716 2756787 7264696105 0 9661 0 7854 31472 4022 4022 0
 1649114146 5958 28460110 182785513108 1083 20391 2539395 6411761497 0 7268 0 8127 32595 4101 4101 0
 </screen>
@@ -2581,8 +2579,7 @@ statement latencies in milliseconds, failures and retries:
   0.582  3363  41576  UPDATE pgbench_branches SET bbalance = bbalance + :delta WHERE bid = :bid;
   0.465     0      0  INSERT INTO pgbench_history (tid, bid, aid, delta, mtime) VALUES (:tid, :bid, :aid, :delta, CURRENT_TIMESTAMP);
   1.933     0      0  END;
- </screen>
-  </para>
+</screen></para>
 
   <para>
    If multiple script files are specified, all statistics are reported
@@ -2637,8 +2634,7 @@ statement latencies in milliseconds, failures and retries:
                supposed to never occur...).
              </para>
            </listitem>
-         </itemizedlist>
-       </para>
+         </itemizedlist></para>
      </listitem>
      <listitem>
        <para>