code: def test_escape_stars():
      signature = str(doc3).split("\n")[0]
      assert_equal(signature, "my_signature(\*params, \*\*kwds)")
  
imports: import sys, textwrap
  from numpydoc.docscrape import NumpyDocString, FunctionDoc, ClassDoc
  from numpydoc.docscrape_sphinx import SphinxDocString, SphinxClassDoc
  from nose.tools import *
label_desc: Use image node_id 15 for calling a global function with example usage: test_escape_stars() without return types