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.
args_from_argspec = set()
        deprecated_args_from_argspec = set()
        doc_options = docs.get('options', {})
        if doc_options is None:
            doc_options = {}
        for arg, data in spec.items():
            restricted_argument_names = ('message', 'syslog_facility')
            if arg.lower() in restricted_argument_names:
                msg = "Argument '%s' in argument_spec " % arg
                if context:
                    msg += " found in %s" % " -> ".join(context)
                msg += "must not be one of %s as it is used " \
                       "internally by Ansible Core Engine" % (",".join(restricted_argument_names))
                self.reporter.error(
                    path=self.object_path,
                    code='invalid-argument-name',
                    msg=msg,
                )
                continue
            if 'aliases' in data:
                for al in data['aliases']:
                    if al.lower() in restricted_argument_names:
                        msg = "Argument alias '%s' in argument_spec " % al
                        if context:
                            msg += " found in %s" % " -> ".join(context)
                        msg += "must not be one of %s as it is used " \
                               "internally by Ansible Core Engine" % (",".join(restricted_argument_names))
                        self.reporter.error(
                            path=self.object_path,
                            code='invalid-argument-name',