Confusion about the range types

Hey!

This is first time I'm writing, so I hope I've done this correctly :)

I'm confused about how range types are returned when queried

When I insert range like this:

INSERT INTO public.tests
VALUES (int4range(7,8,'[]'))

or this

INSERT INTO public.tests
VALUES ('[7,8]')

----------------

After when querying table my return value for this column is not [7,8]
but it is [7,9).
I found this behaviour confusing, because I want to insert 7-8 ranges
(including upper value) and then present that range to a user.

Maybe I'm missing something :)

My PG version is: PostgreSQL 14.0 on aarch64-apple-darwin20.6.0,
compiled by Apple clang version 12.0.5 (clang-1205.0.22.9), 64-bit

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