Confusing description for --no-namespace-packages

[rafalkrupinski]

Bug Report

in the built-in help, the description for --no-namespace-packages is reversed.

To Reproduce

$ mypy --help

Expected Behavior

[...]
Import discovery:
  Configure how imports are discovered and followed.

  --no-namespace-packages   Disable support for namespace packages (PEP 420, __init__.py-less) (inverse: --namespace-packages)

Actual Behavior

[...]
  --no-namespace-packages   Support namespace packages (PEP 420, __init__.py-less) (inverse: --namespace-packages)

Description suggests that the flag enables support for namespace packages. Namespace packages are enabled by default and the flag disables it.
https://github.com/python/mypy/blob/f297917fc9eba13cc2a5b7e2e276394d94c03c8d/mypy/main.py#L564C4-L570C6

Your Environment

• Mypy version used: 1.10.1
• Mypy command-line flags: --help

[hauntsaninja]

PR welcome

[rafalkrupinski]

dibs