docs: def _layout(dict_vars, dict_vars_extra):
      """Print nicely [(var, description)] from phyvars"""
      desc = [(v, m.description) for v, m in dict_vars.items()]
      desc.extend((v, baredoc(m.description))
                  for v, m in dict_vars_extra.items())
      _pretty_print(desc, min_col_width=26)