Fix under-quoted filename pattern in pgbench TAP test.

Avoids issues if build directory's pathname contains regex
metacharacters.

Raúl Marín Rodríguez

Discussion: https://postgr.es/m/CAM6_UM6dGdU39PKAC24T+HD9ouy0jLN9vH6163K8QEEzr__iZw@mail.gmail.com

src/bin/pgbench/t/001_pgbench_with_server.pl

@@ -879,9 +879,10 @@ sub check_pgbench_logs
 
 	my ($prefix, $nb, $min, $max, $re) = @_;
 
-	my @logs = glob "$prefix.*";
+	my $qprefix = quotemeta($prefix);
+	my @logs = glob "$qprefix.*";
 	ok(@logs == $nb, "number of log files");
-	ok(grep(/^$prefix\.\d+(\.\d+)?$/, @logs) == $nb, "file name format");
+	ok(grep(/^$qprefix\.\d+(\.\d+)?$/, @logs) == $nb, "file name format");
 
 	my $log_number = 0;
 	for my $log (sort @logs)