old_contents: # coding: utf-8
  from __future__ import unicode_literals
  
  
  @pytest.mark.xfail
  @pytest.mark.parametrize('text', ["This is a string ", "This is a string\u0020"])
  def test_issue792(en_tokenizer, text):
      """Test for Issue #792: Trailing whitespace is removed after parsing."""
      doc = en_tokenizer(text)
      assert(doc.text_with_ws == text)
  
new_contents: # coding: utf-8
  from __future__ import unicode_literals
  
  import pytest
  
  @pytest.mark.xfail
  @pytest.mark.parametrize('text', ["This is a string ", "This is a string\u0020"])
  def test_issue792(en_tokenizer, text):
      """Test for Issue #792: Trailing whitespace is removed after parsing."""
      doc = en_tokenizer(text)
      assert(doc.text_with_ws == text)
  
subject: Add missing import