<!--- Verify first that your improvement is not already reported on GitHub -->
<!--- Also test if the latest release and devel branch are affected too -->
<!--- Complete *all* sections as described, this form is processed automatically -->

##### SUMMARY
<!--- Explain the problem briefly below, add suggestions to wording or structure -->
group module return values are undocumented.
<!--- HINT: Did you know the documentation has an "Edit on GitHub" link on every page ? -->

##### ISSUE TYPE
- Documentation Report

##### COMPONENT NAME
<!--- Write the short name of the rst file, module, plugin, task or feature below, use your best guess if unsure -->
group
##### ANSIBLE VERSION
<!--- Paste verbatim output from "ansible --version" between quotes -->
```paste below
ansible 2.9.0
  config file = /etc/ansible/ansible.cfg
  configured module search path = ['/home/aschultz/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python3.7/site-packages/ansible
  executable location = /usr/bin/ansible
  python version = 3.7.3 (default, Apr 09 2019, 05:18:21) [GCC]
```
info = self.group_info()
        if self.gid is not None and int(self.gid) != info[2]:
            cmd = [self.module.get_bin_path('dseditgroup', True)]
            cmd += ['-o', 'edit']
            if gid is not None:
                cmd += ['-i', str(gid)]
            cmd += ['-L', self.name]
            (rc, out, err) = self.execute_command(cmd)
            return (rc, out, err)
        return (None, '', '')
    def get_lowest_available_system_gid(self):
        
        try:
            cmd = [self.module.get_bin_path('dscl', True)]
            cmd += ['/Local/Default', '-list', '/Groups', 'PrimaryGroupID']
            (rc, out, err) = self.execute_command(cmd)
            lines = out.splitlines()
            highest = 0
            for group_info in lines:
                parts = group_info.split(' ')
                if len(parts) > 1:
                    gid = int(parts[-1])
                    if gid > highest and gid < 500:
                        highest = gid
            if highest == 0 or highest == 499:
                return False
            return (highest + 1)
        except Exception:
            return False
class OpenBsdGroup(Group):