badly calculated width of emoji in psql

Hi

I am checked an query from
https://www.depesz.com/2021/04/01/waiting-for-postgresql-14-add-unistr-function/
article.

postgres=# SELECT U&'\+01F603';
┌──────────┐
│ ?column? │
╞══════════╡
│ 😃 │
└──────────┘
(1 row)

The result is not correct. Emoji has width 2 chars, but psql calculates
with just one char.

Regards

Pavel