Add missing serial commas

src/backend/catalog/pg_proc.c

@@ -425,7 +425,7 @@ ProcedureCreate(const char *procedureName,
 					 : errmsg("cannot change return type of existing function"),
 
 			/*
-			 * translator: first %s is DROP FUNCTION, DROP PROCEDURE or DROP
+			 * translator: first %s is DROP FUNCTION, DROP PROCEDURE, or DROP
 			 * AGGREGATE
 			 */
 					 errhint("Use %s %s first.",

src/bin/pg_checksums/pg_checksums.c

@@ -72,7 +72,7 @@ static pg_time_t last_progress_report = 0;
 static void
 usage(void)
 {
-	printf(_("%s enables, disables or verifies data checksums in a PostgreSQL database cluster.\n\n"), progname);
+	printf(_("%s enables, disables, or verifies data checksums in a PostgreSQL database cluster.\n\n"), progname);
 	printf(_("Usage:\n"));
 	printf(_("  %s [OPTION]... [DATADIR]\n"), progname);
 	printf(_("\nOptions:\n"));

src/bin/pg_dump/pg_dump.c

@@ -662,7 +662,7 @@ main(int argc, char **argv)
 	 * --rows-per-insert were specified.
 	 */
 	if (dopt.do_nothing && dopt.dump_inserts == 0)
-		fatal("option --on-conflict-do-nothing requires option --inserts, --rows-per-insert or --column-inserts");
+		fatal("option --on-conflict-do-nothing requires option --inserts, --rows-per-insert, or --column-inserts");
 
 	/* Identify archive format to emit */
 	archiveFormat = parseArchiveFormat(format, &archiveMode);

src/bin/pg_dump/pg_dumpall.c

@@ -354,7 +354,7 @@ main(int argc, char *argv[])
 	if (database_exclude_patterns.head != NULL &&
 		(globals_only || roles_only || tablespaces_only))
 	{
-		pg_log_error("option --exclude-database cannot be used together with -g/--globals-only, -r/--roles-only or -t/--tablespaces-only");
+		pg_log_error("option --exclude-database cannot be used together with -g/--globals-only, -r/--roles-only, or -t/--tablespaces-only");
 		fprintf(stderr, _("Try \"%s --help\" for more information.\n"),
 				progname);
 		exit_nicely(1);

src/bin/pg_dump/t/001_basic.pl

@@ -123,7 +123,7 @@ command_fails_like(
 
 command_fails_like(
 	[ 'pg_dump', '--on-conflict-do-nothing' ],
-	qr/pg_dump: error: option --on-conflict-do-nothing requires option --inserts, --rows-per-insert or --column-inserts/,
+	qr/pg_dump: error: option --on-conflict-do-nothing requires option --inserts, --rows-per-insert, or --column-inserts/,
 	'pg_dump: --on-conflict-do-nothing requires --inserts, --rows-per-insert, --column-inserts'
 );