Remove duplicated words in comments.

David Rowley

Author: hlinnaka

src/backend/replication/walsender.c

@@ -2186,9 +2186,9 @@ XLogSendPhysical(void)
 	if (sendTimeLineIsHistoric)
 	{
 		/*
-		 * Streaming an old timeline timeline that's in this server's history,
-		 * but is not the one we're currently inserting or replaying. It can
-		 * be streamed up to the point where we switched off that timeline.
+		 * Streaming an old timeline that's in this server's history, but is
+		 * not the one we're currently inserting or replaying. It can be
+		 * streamed up to the point where we switched off that timeline.
 		 */
 		SendRqstPtr = sendTimeLineValidUpto;
 	}

src/bin/pg_basebackup/pg_basebackup.c

@@ -433,7 +433,7 @@ StartLogStreamer(char *startpos, uint32 timeline, char *sysidentifier)
 	snprintf(param->xlogdir, sizeof(param->xlogdir), "%s/pg_xlog", basedir);
 
 	/*
-	 * Create pg_xlog/archive_status (and thus pg_xlog) so we can can write to
+	 * Create pg_xlog/archive_status (and thus pg_xlog) so we can write to
 	 * basedir/pg_xlog as the directory entry in the tar file may arrive
 	 * later.
 	 */