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.
if terms is None:
            return
        if not isinstance(terms, (list, tuple)):
            
            return
        for check in terms:
            if not isinstance(check, (list, tuple)) or len(check) not in [3, 4]:
                
                continue
            if len(check) == 4 and not isinstance(check[3], bool):
                msg = "required_if"
                if context:
                    msg += " found in %s" % " -> ".join(context)
                msg += " must have forth value omitted or of type bool; got %r" % (check[3], )
                self.reporter.error(
                    path=self.object_path,
                    code='required_if-is_one_of-type',
                    msg=msg,
                )