BUG #18343: Incorrect description in postgresql.conf for max_parallel_workers_per_gather

The following bug has been logged on the website:

Bug reference: 18343
Logged by: Christopher Kline
Email address: kline(dot)christopher(at)gmail(dot)com
PostgreSQL version: 14.11
Operating system: Windows 10 x64
Description:

In the default postgresql.conf that is generated, there are the following
lines:

#max_worker_processes = 8 # (change requires restart)
#max_parallel_workers_per_gather = 2 # taken from max_parallel_workers
<<<<<<<<<<<<<<<<<<<<<<<< THIS
#max_parallel_maintenance_workers = 2 # taken from max_parallel_workers
max_parallel_workers = 8 # maximum number of max_worker_processes that
# can be used in parallel operations

it indicates that the default value is taken from whatever
max_parallel_workers is. However, if I start postgresql with those settings
and issue a query of
SELECT setting, unit FROM pg_settings WHERE name =
'max_parallel_workers_per_gather'

the result I get is '2', not '8'.

This leads me to believe that either there is a bug in the code that's not
setting the correct default, or the comment in postgresql.conf is incorrect.