##### 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.

type: list
        elements: str
    append:
        description:
            - If C(yes), add the user to the groups specified in C(groups).
            - If C(no), user will only be added to the groups specified in C(groups),
              removing them from all other groups.
        type: bool
        default: no
    shell:
        description:
            - Optionally set the user's shell.
            - On macOS, before Ansible 2.5, the default shell for non-system users was C(/usr/bin/false).
              Since Ansible 2.5, the default shell for non-system users on macOS is C(/bin/bash).
            - On other operating systems, the default shell is determined by the underlying tool being
              used. See Notes for details.
        type: str
    home:
        description:
            - Optionally set the user's home directory.
        type: path
    skeleton:
        description:
            - Optionally set a home skeleton directory.
            - Requires C(create_home) option!
        type: str
        version_added: "2.0"
    password:
        description:
            - Optionally set the user's password to this crypted value.