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.
self.reporter.error(
                    path=self.object_path,
                    code='undocumented-parameter',
                    msg=msg
                )
            for arg in docs_missing_from_args:
                msg = "Argument '%s'" % arg
                if context:
                    msg += " found in %s" % " -> ".join(context)
                msg += " is listed in DOCUMENTATION.options, but not accepted by the module argument_spec"
                self.reporter.error(
                    path=self.object_path,
                    code='nonexistent-parameter-documented',
                    msg=msg
                )
    def _check_for_new_args(self, doc):
        if not self.base_branch or self._is_new_module():
            return
        with CaptureStd():
            try:
                existing_doc, dummy_examples, dummy_return, existing_metadata = get_docstring(
                    self.base_module, fragment_loader, verbose=True, collection_name=self.collection_name,
                    is_module=self.plugin_type == 'module')
                existing_options = existing_doc.get('options', {}) or {}
            except AssertionError:
                fragment = doc['extends_documentation_fragment']
                self.reporter.warning(
                    path=self.object_path,
                    code='missing-existing-doc-fragment',
                    msg='Pre-existing DOCUMENTATION fragment missing: %s' % fragment