code: def test_single_chars(
      text="""'This is a single line comment'''
  'and another one'
  # and comments
  "and line breaks"
  
  
  "and it ends here'''"
  
  
  1 + 1
  """,
  ):
      sp = StringParser("python")
      for line in text.splitlines():
          assert not sp.is_quoted()
          sp.read_line(line)
  
imports: from jupytext.stringparser import StringParser
label_desc: Use image node_id 2 for calling a global function with example usage: test_single_chars(text) without return types