new_contents: from __future__ import unicode_literals
  
  
  def test_issue1773(en_tokenizer):
      """Test that spaces don't receive a POS but no TAG. This is the root cause
      of the serialization issue reported in #1773."""
      doc = en_tokenizer('\n')
      if doc[0].pos_ == 'SPACE':
          assert doc[0].tag_ != ""
  
subject: Add test for #1773