##### 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
```

from __future__ import absolute_import, division, print_function
'''
This module is used to manage postgres pg_hba files with Ansible.
'''
__metaclass__ = type
ANSIBLE_METADATA = {'metadata_version': '1.1',
                    'status': ['preview'],
                    'supported_by': 'community'}
DOCUMENTATION = r'''
---
module: postgresql_pg_hba
short_description: Add, remove or modify a rule in a pg_hba file
description:
   - The fundamental function of the module is to create, or delete lines in pg_hba files.
   - The lines in the file should be in a typical pg_hba form and lines should be unique per key (type, databases, users, source).
     If they are not unique and the SID is 'the one to change', only one for C(state=present) or none for C(state=absent) of the SID's will remain.
extends_documentation_fragment: files
version_added: '2.8'
options:
  address:
    description:
      - The source address/net where the connections could come from.
      - Will not be used for entries of I(type)=C(local).
      - You can also use keywords C(all), C(samehost), and C(samenet).
    default: samehost