##### 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
```

dest, task_vars, follow):
        decrypt = boolean(self._task.args.get('decrypt', True), strict=False)
        force = boolean(self._task.args.get('force', 'yes'), strict=False)
        raw = boolean(self._task.args.get('raw', 'no'), strict=False)
        result = {}
        result['diff'] = []
        
        try:
            source_full = self._loader.get_real_file(source_full, decrypt=decrypt)
        except AnsibleFileNotFound as e:
            result['failed'] = True
            result['msg'] = "could not find src=%s, %s" % (source_full, to_text(e))
            return result
        
        
        lmode = None
        if self._task.args.get('mode', None) == 'preserve':
            lmode = '0%03o' % stat.S_IMODE(os.stat(source_full).st_mode)
        
        
        
        if self._connection._shell.path_has_trailing_slash(dest):
            dest_file = self._connection._shell.join_path(dest, source_rel)
        else:
            dest_file = dest
        
        dest_status = self._execute_remote_stat(dest_file, all_vars=task_vars, follow=follow, checksum=force)
        if dest_status['exists'] and dest_status['isdir']: