Typo in unicode_assigned() document PG17

Suzuki Hironobu <hironobu@interdb.jp>

From: Hironobu SUZUKI <hironobu@interdb.jp>

To: pgsql-hackers@postgresql.org

Date: 2024-08-15T00:34:34Z

Lists: pgsql-hackers

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Fix doc typo: unicode_assigned() return type.
- 225483238d3e 17.0 landed
- a3c6aa42ee0d 18.0 landed
Add a couple of recent commits to .git-blame-ignore-revs.
- ef6e028f05b3 18.0 cited

Hi,

The PG17 documentation for unicode_assigned() in doc/src/sgml/func.sgml 
incorrectly states that the function returns a 'text' value. It actually 
returns a boolean value.

unicode_assigned(): 
https://github.com/postgres/postgres/blob/ef6e028f05b3e4ab23c5edfdfff457e0d2a649f6/src/backend/utils/adt/varlena.c#L6302

Best regards,