##### SUMMARY
If a module sets `add_file_common_args=True` when calling `AnsibleModule`, all elements from [FILE_COMMON_ARGUMENTS](https://github.com/ansible/ansible/blob/e9d29b1fe4285d90d7a4506b80260a9e24c3bcea/lib/ansible/module_utils/basic.py#L229-L257) are included in the argument spec. The [files document fragment](https://github.com/ansible/ansible/blob/e9d29b1fe4285d90d7a4506b80260a9e24c3bcea/lib/ansible/plugins/doc_fragments/files.py#L15-L80) only documents a subset of them, though. Missing are:
 - src
 - follow
 - force
 - content
 - backup
 - remote_src
 - regexp
 - delimiter
 - directory_mode

Most module authors using `add_file_common_args=True` are probably not aware that their modules have these options as well.

I don't think these extra options should be added by default if `add_file_common_args=True` is specified.

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
lib/ansible/module_utils/basic.py

##### ANSIBLE VERSION
```
devel
```

self._string_conversion_action = ''
        self.aliases = {}
        self._legal_inputs = []
        self._options_context = list()
        self._tmpdir = None
        if add_file_common_args:
            for k, v in FILE_COMMON_ARGUMENTS.items():
                if k not in self.argument_spec:
                    self.argument_spec[k] = v
        self._load_params()
        self._set_fallbacks()
        
        try:
            self.aliases = self._handle_aliases()
        except (ValueError, TypeError) as e:
            
            print('\n{"failed": true, "msg": "Module alias error: %s"}' % to_native(e))
            sys.exit(1)
        
        self.no_log_values = set()
        self._handle_no_log_values()
        
        
        self._check_locale()
        self._check_arguments()
        
        if not bypass_checks:
            self._check_mutually_exclusive(mutually_exclusive)
        self._set_defaults(pre=True)
        self._CHECK_ARGUMENT_TYPES_DISPATCHER = {