##### 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
```

'''
        This method resets self.diff to a empty default
        '''
        self.diff = {'before': {'file': self.pg_hba_file, 'pg_hba': []},
                     'after': {'file': self.pg_hba_file, 'pg_hba': []}}
    def read(self):
        '''
        Read in the pg_hba from the system
        '''
        self.rules = {}
        self.comment = []
        
        try:
            with open(self.pg_hba_file, 'r') as file:
                for line in file:
                    line = line.strip()
                    
                    if '#' in line:
                        line, comment = line.split('#', 1)
                        self.comment.append('#' + comment)
                    try:
                        self.add_rule(PgHbaRule(line=line))
                    except PgHbaRuleError:
                        pass
            self.unchanged()
        except IOError:
            pass
    def write(self, backup_file=''):