##### 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.

'''Hide or show user on login window according SELF.SYSTEM.
        Returns 0 if a change has been made, None otherwise.'''
        plist_file = '/Library/Preferences/com.apple.loginwindow.plist'
        
        cmd = ['defaults', 'read', plist_file, 'HiddenUsersList']
        (rc, out, err) = self.execute_command(cmd, obey_checkmode=False)
        
        
        
        
        
        
        hidden_users = []
        for x in out.splitlines()[1:-1]:
            try:
                x = x.split('"')[1]
            except IndexError:
                x = x.strip()
            hidden_users.append(x)
        if self.system:
            if self.name not in hidden_users:
                cmd = ['defaults', 'write', plist_file, 'HiddenUsersList', '-array-add', self.name]
                (rc, out, err) = self.execute_command(cmd)
                if rc != 0: