code: def test_arguments(self) -> None:
      doc__ = "-- {}{as_parameter} --"
      assert (
          bus.format_docstring(doc__, "hello ", as_parameter="world")
          == "-- hello world --"
      )
      doc__ = None
      assert (
          bus.format_docstring(doc__, "hello ", as_parameter="world")
          is None
      )
  
imports: from __future__ import annotations
  import pytest
  from urllib.parse import quote_plus
  import bokeh.util.strings
label_desc: Use image node_id 3 for calling the Test_format_docstring obj's underlying member method code with example usage: obj.test_arguments() without return types