##### 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
```

if mode is None:
            return changed
        b_path = to_bytes(path, errors='surrogate_or_strict')
        if expand:
            b_path = os.path.expanduser(os.path.expandvars(b_path))
        path_stat = os.lstat(b_path)
        if self.check_file_absent_if_check_mode(b_path):
            return True
        if not isinstance(mode, int):
            try:
                mode = int(mode, 8)
            except Exception:
                try:
                    mode = self._symbolic_mode_to_octal(path_stat, mode)
                except Exception as e:
                    path = to_text(b_path)
                    self.fail_json(path=path,
                                   msg="mode must be in octal or symbolic form",
                                   details=to_native(e))
                if mode != stat.S_IMODE(mode):
                    
                    path = to_text(b_path)
                    self.fail_json(path=path, msg="Invalid mode supplied, only permission info is allowed", details=mode)
        prev_mode = stat.S_IMODE(path_stat.st_mode)
        if prev_mode != mode:
            if diff is not None:
                if 'before' not in diff:
                    diff['before'] = {}