Fix typos in comments.

Vinayak Pokale

src/backend/postmaster/pgstat.c

@@ -2411,7 +2411,7 @@ pgstat_fetch_stat_beentry(int beid)
 /* ----------
  * pgstat_fetch_stat_local_beentry() -
  *
- *	Like pgstat_fetch_stat_beentry() but with locally computed addtions (like
+ *	Like pgstat_fetch_stat_beentry() but with locally computed additions (like
  *	xid and xmin values of the backend)
  *
  *	NB: caller is responsible for a check if the user is permitted to see

src/backend/replication/logical/reorderbuffer.c

@@ -2552,7 +2552,7 @@ ReorderBufferRestoreChange(ReorderBuffer *rb, ReorderBufferTXN *txn,
 				Assert(change->data.msg.prefix[prefix_size - 1] == '\0');
 				data += prefix_size;
 
-				/* read the messsage */
+				/* read the message */
 				memcpy(&change->data.msg.message_size, data, sizeof(Size));
 				data += sizeof(Size);
 				change->data.msg.message = MemoryContextAlloc(rb->context,

src/include/pgstat.h

@@ -895,7 +895,7 @@ typedef struct PgBackendStatus
 	/*
 	 * Command progress reporting.  Any command which wishes can advertise
 	 * that it is running by setting st_progress_command,
-	 * st_progress_command_target, and st_progress_command[].
+	 * st_progress_command_target, and st_progress_param[].
 	 * st_progress_command_target should be the OID of the relation which the
 	 * command targets (we assume there's just one, as this is meant for
 	 * utility commands), but the meaning of each element in the