sepgsql: update TAP test to use fat comma style

Adopt the style introduced by commit ce1b0f9da0 to this new test
file.

Author: Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>
Discussion: https://www.postgresql.org/message-id/87y0yv2har.fsf@wibble.ilmari.org

contrib/sepgsql/t/001_sepgsql.pl

@@ -211,10 +211,10 @@ $node->append_conf('postgresql.conf', 'log_statement=none');
 
 	my $result = run_log(
 		[
-			'postgres', '--single',
-			'-F', '-c',
-			'exit_on_error=true', '-D',
-			$node->data_dir, 'template0'
+			'postgres', '--single', '-F',
+			'-c' => 'exit_on_error=true',
+			'-D' => $node->data_dir,
+			'template0'
 		],
 		'<',
 		$ENV{share_contrib_dir} . '/sepgsql.sql');
@@ -238,8 +238,11 @@ push @tests, 'truncate' if -f '/sys/fs/selinux/class/db_table/perms/truncate';
 
 $node->command_ok(
 	[
-		$ENV{PG_REGRESS}, '--bindir=', '--inputdir=.', '--launcher',
-		'./launcher', @tests
+		$ENV{PG_REGRESS},
+		'--bindir' => '',
+		'--inputdir' => '.',
+		'--launcher' => './launcher',
+		@tests
 	],
 	'sepgsql tests');