##### 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
```

owner: root
    group: root
    mode: '0644'
    backup: yes
- name: Copy a new "sudoers" file into place, after passing validation with visudo
  copy:
    src: /mine/sudoers
    dest: /etc/sudoers
    validate: /usr/sbin/visudo -csf %s
- name: Copy a "sudoers" file on the remote machine for editing
  copy:
    src: /etc/sudoers
    dest: /etc/sudoers.edit
    remote_src: yes
    validate: /usr/sbin/visudo -csf %s
- name: Copy using inline content
  copy:
    content: '# This file was moved to /etc/other.conf'
    dest: /etc/mine.conf
- name: If follow=yes, /path/to/file will be overwritten by contents of foo.conf
  copy:
    src: /etc/foo.conf
    dest: /path/to/link  # link to /path/to/file
    follow: yes
- name: If follow=no, /path/to/link will become a file and be overwritten by contents of foo.conf
  copy:
    src: /etc/foo.conf
    dest: /path/to/link  # link to /path/to/file
    follow: no
'''