##### SUMMARY
The documentation of the module *user* / parameter *shell* states:

https://github.com/ansible/ansible/blob/8edad83ae029d7838a6d6347576d2ddbcce12ad0/lib/ansible/modules/system/user.py#L79

But there are no (shell specific) notes.
##### ISSUE TYPE
- Documentation Report

##### COMPONENT NAME
user / docs

##### ANSIBLE VERSION
devel branch

##### CONFIGURATION
N/A

##### OS / ENVIRONMENT
N/A

##### ADDITIONAL INFORMATION
Either remove the sentence or provide some information in the notes section.

self.module.fail_json(msg='Cannot user "%s" to hidden user list.' % self.name, err=err, out=out, rc=rc)
                return 0
        else:
            if self.name in hidden_users:
                del (hidden_users[hidden_users.index(self.name)])
                cmd = ['defaults', 'write', plist_file, 'HiddenUsersList', '-array'] + hidden_users
                (rc, out, err) = self.execute_command(cmd)
                if rc != 0:
                    self.module.fail_json(msg='Cannot remove user "%s" from hidden user list.' % self.name, err=err, out=out, rc=rc)
                return 0
    def user_exists(self):
        '''Check is SELF.NAME is a known user on the system.'''
        cmd = self._get_dscl()
        cmd += ['-list', '/Users/%s' % self.name]
        (rc, out, err) = self.execute_command(cmd, obey_checkmode=False)
        return rc == 0
    def remove_user(self):
        '''Delete SELF.NAME. If SELF.FORCE is true, remove its home directory.'''
        info = self.user_info()
        cmd = self._get_dscl()
        cmd += ['-delete', '/Users/%s' % self.name]
        (rc, out, err) = self.execute_command(cmd)
        if rc != 0:
            self.module.fail_json(msg='Cannot delete user "%s".' % self.name, err=err, out=out, rc=rc)
        if self.force:
            if os.path.exists(info[5]):
                shutil.rmtree(info[5])
                out += "Removed %s" % info[5]
        return (rc, out, err)
    def create_user(self, command_name='dscl'):