code: def test_non_whitespace(self):
      self.none_removed("a")
      self.check_result("a\n", "a")
      self.check_result("a\n ", "a")
      self.check_result("a \n ", "a")
      self.check_result("a \n\t", "a")
      self.none_removed("-")
      self.check_result("-\n", "-")
      self.none_removed(".")
      self.check_result(".\n", ".")
  
imports: from idlelib import pyshell
  import unittest
  from test.support import requires
  from tkinter import Tk
label_desc: Use image node_id 9 for calling the PyShellRemoveLastNewlineAndSurroundingWhitespaceTest obj's underlying member method code with example usage: obj.test_non_whitespace() without return types