https://github.com/ansible/ansible/blob/1706d35fc476e36fcced25435c2f1c2401536376/test/lib/ansible_test/_util/controller/sanity/validate-modules/validate_modules/main.py#L414

When a module is in place to provide documentation for an action, it should be allowed to have a doc string.

Without a docstring users of pydocstring will need to suppress:

```
************* Module plugins.modules.git_away
plugins/modules/git_away.py:1:0: C0114: Missing module docstring (missing-module-docstring)
************* Module plugins.modules.git_here
plugins/modules/git_here.py:1:0: C0114: Missing module docstring (missing-module-docstring)
```

With a doc string the module is treated as a "real" module and fails sanity:

```
ansible-module-not-initialized: Execution of the module did not result in initialization of AnsibleModule
```

PEP257 suggests modules should have a docstring, and is generally considered a good practice to inform future developers of the purpose of the file and can be used for documentation generation as well.
parser = argparse.ArgumentParser(prog="validate-modules")
    parser.add_argument('plugins', nargs='+',
                        help='Path to module/plugin or module/plugin directory')
    parser.add_argument('-w', '--warnings', help='Show warnings',
                        action='store_true')
    parser.add_argument('--exclude', help='RegEx exclusion pattern',
                        type=re_compile)
    parser.add_argument('--arg-spec', help='Analyze module argument spec',
                        action='store_true', default=False)
    parser.add_argument('--base-branch', default=None,
                        help='Used in determining if new options were added')
    parser.add_argument('--format', choices=['json', 'plain'], default='plain',
                        help='Output format. Default: "%(default)s"')
    parser.add_argument('--output', default='-',
                        help='Output location, use "-" for stdout. '
                             'Default "%(default)s"')
    parser.add_argument('--collection',
                        help='Specifies the path to the collection, when '
                             'validating files within a collection. Ensure '
                             'that ANSIBLE_COLLECTIONS_PATH is set so the '
                             'contents of the collection can be located')
    parser.add_argument('--collection-version',
                        help='The collection\'s version number used to check '
                             'deprecations')
    parser.add_argument('--plugin-type',
                        default='module',
                        help='The plugin type to validate. Defaults to %(default)s')
    args = parser.parse_args()