##### 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
```

# The return information includes all the HTTP headers in lower-case.
content:
  description: The response body content.
  returned: status not in status_code or return_content is true
  type: str
  sample: "{}"
cookies:
  description: The cookie values placed in cookie jar.
  returned: on success
  type: dict
  sample: {"SESSIONID": "[SESSIONID]"}
  version_added: "2.4"
cookies_string:
  description: The value for future request Cookie headers.
  returned: on success
  type: str
  sample: "SESSIONID=[SESSIONID]"
  version_added: "2.6"
elapsed:
  description: The number of seconds that elapsed while performing the download.
  returned: on success
  type: int
  sample: 23
msg:
  description: The HTTP message from the request.
  returned: always
  type: str
  sample: OK (unknown bytes)
redirected:
  description: Whether the request was redirected.