new_contents: import pytest
  
  import spacy
  
  
  @pytest.mark.models
  def test_not_lemmatize_base_forms():
      nlp = spacy.load('en', parser=False)
      doc = nlp(u"Don't feed the dog")
      feed = doc[2]
      feed.tag_ = u'VB'
      assert feed.text == u'feed'
      assert feed.lemma_ == u'feed'
  
  
subject: Test #595 -- Bug in lemmatization of base forms.