Fix misc typos in comments.

src/bin/pg_basebackup/pg_recvlogical.c

 /*-------------------------------------------------------------------------
  *
- * pg_recvlogical.c - receive data from a logical decoding slot in a streaming fashion
- *					  and write it to to a local file.
+ * pg_recvlogical.c - receive data from a logical decoding slot in a streaming
+ *					  fashion and write it to a local file.
  *
  * Portions Copyright (c) 1996-2014, PostgreSQL Global Development Group
  *
@@ -110,7 +110,7 @@ sendFeedback(PGconn *conn, int64 now, bool force, bool replyRequested)
 	int			len = 0;
 
 	/*
-	 * we normally don't want to send superflous feedbacks, but if it's
+	 * we normally don't want to send superfluous feedbacks, but if it's
 	 * because of a timeout we need to, otherwise wal_sender_timeout will
 	 * kill us.
 	 */

src/test/regress/expected/replica_identity.out

@@ -34,7 +34,7 @@ SELECT relreplident FROM pg_class WHERE oid = 'pg_constraint'::regclass;
 (1 row)
 
 ----
--- Make sure we detect inelegible indexes
+-- Make sure we detect ineligible indexes
 ----
 -- fail, not unique
 ALTER TABLE test_replica_identity REPLICA IDENTITY USING INDEX test_replica_identity_keyab;

src/test/regress/sql/replica_identity.sql

@@ -23,7 +23,7 @@ SELECT relreplident FROM pg_class WHERE oid = 'pg_class'::regclass;
 SELECT relreplident FROM pg_class WHERE oid = 'pg_constraint'::regclass;
 
 ----
--- Make sure we detect inelegible indexes
+-- Make sure we detect ineligible indexes
 ----
 
 -- fail, not unique