Re: [] Improve amcheck to also check UNIQUE constraint in btree index.

Hi!

I would make two cosmetic changes.

1. I suggest replace description of function bt_report_duplicate() from
```
/*
* Prepare and print an error message for unique constrain violation in
* a btree index under WARNING level. Also set a flag to report ERROR
* at the end of the check.
*/
```
to
```
/*
* Prepare an error message for unique constrain violation in
* a btree index and report ERROR.
*/
```

2. I think will be better to change test 004_verify_nbtree_unique.pl -
replace
```
use Test::More tests => 6;
```
to
```
use Test::More;
...
done_testing();
```
(same as in the other three tests).

--
With best regards,
Dmitry Koval

Postgres Professional: http://postgrespro.com