##### 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
```

group_changed = (os.stat(file).st_gid != gid)
                    if group_changed is True:
                        changed = group_changed
    return changed
def copy_diff_files(src, dest, module):
    changed = False
    owner = module.params['owner']
    group = module.params['group']
    local_follow = module.params['local_follow']
    diff_files = filecmp.dircmp(src, dest).diff_files
    if len(diff_files):
        changed = True
    if not module.check_mode:
        for item in diff_files:
            src_item_path = os.path.join(src, item)
            dest_item_path = os.path.join(dest, item)
            b_src_item_path = to_bytes(src_item_path, errors='surrogate_or_strict')
            b_dest_item_path = to_bytes(dest_item_path, errors='surrogate_or_strict')
            if os.path.islink(b_src_item_path) and local_follow is False:
                linkto = os.readlink(b_src_item_path)
                os.symlink(linkto, b_dest_item_path)
            else:
                shutil.copyfile(b_src_item_path, b_dest_item_path)
            if owner is not None:
                module.set_owner_if_different(b_dest_item_path, owner, False)
            if group is not None:
                module.set_group_if_different(b_dest_item_path, group, False)
            changed = True
    return changed
def copy_left_only(src, dest, module):