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.
continue
            if arg_default != doc_default:
                msg = "Argument '%s' in argument_spec" % arg
                if context:
                    msg += " found in %s" % " -> ".join(context)
                msg += " defines default as (%r) but documentation defines default as (%r)" % (arg_default, doc_default)
                self.reporter.error(
                    path=self.object_path,
                    code='doc-default-does-not-match-spec',
                    msg=msg
                )
            doc_type = doc_options_arg.get('type')
            if 'type' in data and data['type'] is not None:
                if doc_type is None:
                    if not arg.startswith('_'):  
                        msg = "Argument '%s' in argument_spec" % arg
                        if context:
                            msg += " found in %s" % " -> ".join(context)
                        msg += " defines type as %r but documentation doesn't define type" % (data['type'])
                        self.reporter.error(
                            path=self.object_path,
                            code='parameter-type-not-in-doc',
                            msg=msg
                        )
                elif data['type'] != doc_type:
                    msg = "Argument '%s' in argument_spec" % arg
                    if context:
                        msg += " found in %s" % " -> ".join(context)
                    msg += " defines type as %r but documentation defines type as %r" % (data['type'], doc_type)
                    self.reporter.error(