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.
msg = "required_if"
                if context:
                    msg += " found in %s" % " -> ".join(context)
                msg += " contains its key %s in requirements" % key
                self.reporter.error(
                    path=self.object_path,
                    code='required_if-key-in-requirements',
                    msg=msg,
                )
            value = check[1]
            if value is not None:
                _type = spec[key].get('type', 'str')
                if callable(_type):
                    _type_checker = _type
                else:
                    _type_checker = DEFAULT_TYPE_VALIDATORS.get(_type)
                try:
                    with CaptureStd():
                        dummy = _type_checker(value)
                except (Exception, SystemExit):
                    msg = "required_if"
                    if context:
                        msg += " found in %s" % " -> ".join(context)
                    msg += " has value %r which does not fit to %s's parameter type %r" % (value, key, _type)
                    self.reporter.error(
                        path=self.object_path,
                        code='required_if-value-type',
                        msg=msg,
                    )
    def _validate_required_by(self, terms, spec, context):