Fix typos in comments.

src/backend/tcop/postgres.c

@@ -1999,7 +1999,7 @@ exec_execute_message(const char *portal_name, long max_rows)
  * check_log_statement
  *		Determine whether command should be logged because of log_statement
  *
- * parsetree_list can be either raw grammar output or a list of planned
+ * stmt_list can be either raw grammar output or a list of planned
  * statements
  */
 static bool

src/bin/pg_basebackup/receivelog.c

@@ -410,7 +410,7 @@ CheckServerVersionForStreaming(PGconn *conn)
  * indefinitely.
  *
  * standby_message_timeout controls how often we send a message
- * back to the master letting it know our progress, in seconds.
+ * back to the master letting it know our progress, in miliseconds.
  * This message will only contain the write location, and never
  * flush or replay.
  *

src/include/postgres.h

@@ -680,7 +680,7 @@ extern Datum Float8GetDatum(float8 X);
  */
 
 /*
- * Backend only infrastructure for the the assertion-related macros in c.h.
+ * Backend only infrastructure for the assertion-related macros in c.h.
  *
  * ExceptionalCondition must be present even when assertions are not enabled.
  */