pass_env values cannot contain whitespace

[mtelka]

Bug Report

tox4 does not support pass_env values with whitespace in tox.ini.

To Reproduce

$ tox -l
...
tox.tox_env.errors.Fail: pass_env values cannot contain whitespace, use comma to have multiple values in a single line, invalid values found 'PYTEST_XDIST_WORKER_COUNT PROGRAMDATA PROGRAMFILES(X86)'
$

Expected Behavior

tox -l shows list of envs

Actual Behavior

$ tox -l
...
tox.tox_env.errors.Fail: pass_env values cannot contain whitespace, use comma to have multiple values in a single line, invalid values found 'PYTEST_XDIST_WORKER_COUNT PROGRAMDATA PROGRAMFILES(X86)'
$

Your Environment

• Mypy version used: 0.991
• Python version used: 3.9.16
• tox version: 4.3.5