[GRASS-dev] Force --v flag whenever -l is instructed

[Nikos Alexandris]

Nikos:

>>>>I tested already (before asking)
>>>>
>>>>env = os.environ.copy()
>>>>if list_only:
>>>>  env['GRASS_VERBOSE'] = '3'
>>>>
>>>>but it does not work.

Moritz:

>>In Python, something like this should work IIRC:
>>
>>import os
>>os.environ['GRASS_VERBOSE'] = '3'

>But of course it works!  Don't know why I got stuck with env instead
>os.environ.

For the records, it's somewhat about the logic of the script I am
building. Yet also that, copy(), as used in the first example,
creates a shallow copy.  Deep copy works, i.e.
`env=copy.deepcopy(os.environ)` or simply `env=os.environ`

Nikos
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