Fix typos

Author: Amit Langote

src/backend/replication/syncrep.c

@@ -406,7 +406,7 @@ SyncRepGetSynchronousStandby(void)
  * Update the LSNs on each queue based upon our latest state. This
  * implements a simple policy of first-valid-standby-releases-waiter.
  *
- * Other policies are possible, which would change what we do here and what
+ * Other policies are possible, which would change what we do here and
  * perhaps also which information we store as well.
  */
 void
@@ -419,9 +419,9 @@ SyncRepReleaseWaiters(void)
 
 	/*
 	 * If this WALSender is serving a standby that is not on the list of
-	 * potential standbys then we have nothing to do. If we are still starting
-	 * up, still running base backup or the current flush position is still
-	 * invalid, then leave quickly also.
+	 * potential sync standbys then we have nothing to do. If we are still
+	 * starting up, still running base backup or the current flush position
+	 * is still invalid, then leave quickly also.
 	 */
 	if (MyWalSnd->sync_standby_priority == 0 ||
 		MyWalSnd->state < WALSNDSTATE_STREAMING ||