##### 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.

if self.local:
            command_name = 'luserdel'
        else:
            command_name = 'userdel'
        cmd = [self.module.get_bin_path(command_name, True)]
        if self.force and not self.local:
            cmd.append('-f')
        if self.remove:
            cmd.append('-r')
        cmd.append(self.name)
        return self.execute_command(cmd)
    def create_user_useradd(self):
        if self.local:
            command_name = 'luseradd'
            lgroupmod_cmd = self.module.get_bin_path('lgroupmod', True)
            lchage_cmd = self.module.get_bin_path('lchage', True)
        else:
            command_name = 'useradd'
        cmd = [self.module.get_bin_path(command_name, True)]
        if self.uid is not None:
            cmd.append('-u')
            cmd.append(self.uid)
            if self.non_unique:
                cmd.append('-o')
        if self.seuser is not None:
            cmd.append('-Z')
            cmd.append(self.seuser)
        if self.group is not None: