doc: Whitespace fixes in man pages

doc/src/sgml/ref/insert.sgml

@@ -295,8 +295,7 @@ INSERT INTO <replaceable class="PARAMETER">table_name</replaceable> [ AS <replac
     inference, it consists of one or more <replaceable
     class="PARAMETER">index_column_name</replaceable> columns and/or
     <replaceable class="PARAMETER">index_expression</replaceable>
-    expressions, and an optional <replaceable class="PARAMETER">
+    expressions, and an optional <replaceable class="PARAMETER">index_predicate</replaceable>.  All <replaceable
-    index_predicate</replaceable>.  All <replaceable
     class="PARAMETER">table_name</replaceable> unique indexes that,
     without regard to order, contain exactly the
     <parameter>conflict_target</parameter>-specified

doc/src/sgml/ref/pgupgrade.sgml

@@ -410,8 +410,7 @@ pg_upgrade.exe
    </step>
 
    <step>
-    <title>Upgrade Streaming Replication and Log-Shipping standby
+    <title>Upgrade Streaming Replication and Log-Shipping standby servers</title>
-    servers</title>
 
     <para>
      If you have Streaming Replication (see <xref
@@ -434,8 +433,7 @@ pg_upgrade.exe
      </step>
 
      <step>
-      <title>Make sure the new standby data directories do <emphasis>not</>
+      <title>Make sure the new standby data directories do <emphasis>not</> exist</title>
-      exist</title>
 
       <para>
        Make sure the new standby data directories do <emphasis>not</>
@@ -514,8 +512,7 @@ rsync --archive --delete --hard-links --size-only old_pgdata new_pgdata remote_d
      </step>
 
      <step>
-      <title>Configure streaming replication and log-shipping standby
+      <title>Configure streaming replication and log-shipping standby servers</title>
-      servers</title>
 
       <para>
        Configure the servers for log shipping.  (You do not need to run