pg_upgrade: Message style improvements

src/bin/pg_upgrade/check.c

@@ -342,7 +342,7 @@ check_for_data_types_usage(ClusterInfo *cluster, DataTypesUsageChecks *checks)
 	DataTypesUsageChecks *tmp = checks;
 	int			n_data_types_usage_checks = 0;
 
-	prep_status("Checking for data type usage");
+	prep_status("Checking data type usage");
 
 	/* Gather number of checks to perform */
 	while (tmp->status != NULL)
@@ -1756,7 +1756,7 @@ check_new_cluster_logical_replication_slots(void)
 	nslots_on_new = atoi(PQgetvalue(res, 0, 0));
 
 	if (nslots_on_new)
-		pg_fatal("Expected 0 logical replication slots but found %d.",
+		pg_fatal("expected 0 logical replication slots but found %d",
 				 nslots_on_new);
 
 	PQclear(res);
@@ -1771,7 +1771,7 @@ check_new_cluster_logical_replication_slots(void)
 	wal_level = PQgetvalue(res, 0, 0);
 
 	if (strcmp(wal_level, "logical") != 0)
-		pg_fatal("\"wal_level\" must be \"logical\", but is set to \"%s\"",
+		pg_fatal("\"wal_level\" must be \"logical\" but is set to \"%s\"",
 				 wal_level);
 
 	max_replication_slots = atoi(PQgetvalue(res, 1, 0));
@@ -1895,7 +1895,7 @@ check_old_cluster_for_valid_slots(void)
 		fclose(script);
 
 		pg_log(PG_REPORT, "fatal");
-		pg_fatal("Your installation contains logical replication slots that can't be upgraded.\n"
+		pg_fatal("Your installation contains logical replication slots that cannot be upgraded.\n"
 				 "You can remove invalid slots and/or consume the pending WAL for other slots,\n"
 				 "and then restart the upgrade.\n"
 				 "A list of the problematic slots is in the file:\n"

src/bin/pg_upgrade/info.c

@@ -827,13 +827,13 @@ print_slot_infos(LogicalSlotInfoArr *slot_arr)
 	if (slot_arr->nslots == 0)
 		return;
 
-	pg_log(PG_VERBOSE, "Logical replication slots within the database:");
+	pg_log(PG_VERBOSE, "Logical replication slots in the database:");
 
 	for (int slotnum = 0; slotnum < slot_arr->nslots; slotnum++)
 	{
 		LogicalSlotInfo *slot_info = &slot_arr->slots[slotnum];
 
-		pg_log(PG_VERBOSE, "slot_name: \"%s\", plugin: \"%s\", two_phase: %s",
+		pg_log(PG_VERBOSE, "slot name: \"%s\", output plugin: \"%s\", two_phase: %s",
 			   slot_info->slotname,
 			   slot_info->plugin,
 			   slot_info->two_phase ? "true" : "false");

src/bin/pg_upgrade/t/003_logical_slots.pl

@@ -117,7 +117,7 @@ command_checks_all(
 	[@pg_upgrade_cmd],
 	1,
 	[
-		qr/Your installation contains logical replication slots that can't be upgraded./
+		qr/Your installation contains logical replication slots that cannot be upgraded./
 	],
 	[qr//],
 	'run of pg_upgrade of old cluster with slots having unconsumed WAL records'