##### 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.

cmd.append(self.home)
        if self.shell is not None:
            cmd.append('-s')
            cmd.append(self.shell)
        if self.create_home:
            cmd.append('-m')
            if self.skeleton is not None:
                cmd.append('-k')
                cmd.append(self.skeleton)
        cmd.append(self.name)
        (rc, out, err) = self.execute_command(cmd)
        
        if self.password is not None:
            cmd = []
            cmd.append(self.module.get_bin_path('chpasswd', True))
            cmd.append('-e')
            cmd.append('-c')
            self.execute_command(cmd, data="%s:%s" % (self.name, self.password))
        return (rc, out, err)
    def modify_user_usermod(self):
        cmd = [self.module.get_bin_path('usermod', True)]
        info = self.user_info()
        if self.uid is not None and info[2] != int(self.uid):
            cmd.append('-u')
            cmd.append(self.uid)
        if self.group is not None:
            if not self.group_exists(self.group):
                self.module.fail_json(msg="Group %s does not exist" % self.group)
            ginfo = self.group_info(self.group)
            if info[3] != ginfo[2]: