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.
missing_fragment = True
                        except Exception as e:
                            self.reporter.trace(
                                path=self.object_path,
                                tracebk=traceback.format_exc()
                            )
                            self.reporter.error(
                                path=self.object_path,
                                code='documentation-error',
                                msg='Unknown DOCUMENTATION error, see TRACE: %s' % e
                            )
                    if not missing_fragment:
                        add_fragments(doc, self.object_path, fragment_loader=fragment_loader,
                                      is_module=self.plugin_type == 'module')
                    if 'options' in doc and doc['options'] is None:
                        self.reporter.error(
                            path=self.object_path,
                            code='invalid-documentation-options',
                            msg='DOCUMENTATION.options must be a dictionary/hash when used',
                        )
                    if 'deprecated' in doc and doc.get('deprecated'):
                        doc_deprecated = True
                        doc_deprecation = doc['deprecated']
                        documentation_collection = doc_deprecation.get('removed_from_collection')
                        if documentation_collection != self.collection_name:
                            self.reporter.error(
                                path=self.object_path,
                                code='deprecation-wrong-collection',
                                msg='"DOCUMENTATION.deprecation.removed_from_collection must be the current collection name: %r vs. %r' % (
                                    documentation_collection, self.collection_name)