##### 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
```

module.params['path'] = dest
            file_args = module.load_file_common_arguments(module.params)
            file_args['path'] = dest
            resp['changed'] = module.set_fs_attributes_if_different(file_args, resp['changed'])
        resp['path'] = dest
    
    
    
    
    uresp = {}
    for key, value in iteritems(resp):
        ukey = key.replace("-", "_").lower()
        uresp[ukey] = value
    if 'location' in uresp:
        uresp['location'] = absolute_location(url, uresp['location'])
    
    content_encoding = 'utf-8'
    if 'content_type' in uresp:
        
        charsets = []
        content_types = []
        for value in uresp['content_type'].split(','):
            ct, params = cgi.parse_header(value)
            if ct not in content_types:
                content_types.append(ct)
            if 'charset' in params:
                if params['charset'] not in charsets:
                    charsets.append(params['charset'])
        if content_types:
            content_type = content_types[0]