Fix a typo and some doc indentation related to libpq pipeline functions

Noticed while reviewing the area for a different patch.  This is
cosmetic, so no backpatch is done.

Author: michaelpq

doc/src/sgml/libpq.sgml

@@ -5813,28 +5813,28 @@ int PQpipelineSync(PGconn *conn);
     <varlistentry id="libpq-PQsendFlushRequest">
      <term><function>PQsendFlushRequest</function><indexterm><primary>PQsendFlushRequest</primary></indexterm></term>
 
-      <listitem>
-       <para>
-        Sends a request for the server to flush its output buffer.
+     <listitem>
+      <para>
+       Sends a request for the server to flush its output buffer.
 <synopsis>
 int PQsendFlushRequest(PGconn *conn);
 </synopsis>
-       </para>
+      </para>
 
-       <para>
-        Returns 1 for success.  Returns 0 on any failure.
-       </para>
-       <para>
-        The server flushes its output buffer automatically as a result of
-        <function>PQpipelineSync</function> being called, or
-        on any request when not in pipeline mode; this function is useful
-        to cause the server to flush its output buffer in pipeline mode
-        without establishing a synchronization point.
-        Note that the request is not itself flushed to the server automatically;
-        use <function>PQflush</function> if necessary.
-       </para>
-      </listitem>
-     </varlistentry>
+      <para>
+       Returns 1 for success.  Returns 0 on any failure.
+      </para>
+      <para>
+       The server flushes its output buffer automatically as a result of
+       <function>PQpipelineSync</function> being called, or
+       on any request when not in pipeline mode; this function is useful
+       to cause the server to flush its output buffer in pipeline mode
+       without establishing a synchronization point.
+       Note that the request is not itself flushed to the server automatically;
+       use <function>PQflush</function> if necessary.
+      </para>
+     </listitem>
+    </varlistentry>
    </variablelist>
   </sect2>
 

src/interfaces/libpq/fe-exec.c

@@ -3235,7 +3235,7 @@ pqPipelineProcessQueue(PGconn *conn)
  * error, a PGresult with PGRES_PIPELINE_SYNC is produced.
  *
  * Queries can already have been sent before PQpipelineSync is called, but
- * PQpipelineSync need to be called before retrieving command results.
+ * PQpipelineSync needs to be called before retrieving command results.
  *
  * The connection will remain in pipeline mode and unavailable for new
  * synchronous command execution functions until all results from the pipeline