          return '%s...' % x[:max(0, limit - 3)]
      safe_input = isinstance(text, SafeData)
      words = word_split_re.split(force_text(text))
      for i, word in enumerate(words):
          match = None
          if '.' in word or '@' in word or ':' in word:
              # Deal with punctuation.
              lead, middle, trail = '', word, ''
              for punctuation in TRAILING_PUNCTUATION:
                  if middle.endswith(punctuation):
 
</s> remove         err = self.errors
 </s> add         # This triggers a full clean.
        self.errors </s> remove             backend_cls = import_by_path(backend)
 </s> add             import_by_path(backend) </s> remove     def test_invalid_key_backslash(self):
        # This key should be refused and a new session should be created
        self.assertTrue(self.backend("a\\b\\c").load())

 </s> add  </s> remove             from django.conf import settings
 </s> add  </s> remove                 except ImproperlyConfigured as e:
 </s> add                 except ImproperlyConfigured:
          return '%s...' % x[:max(0, limit - 3)]
      safe_input = isinstance(text, SafeData)
      words = word_split_re.split(force_text(text))
      for i, word in enumerate(words):

          if '.' in word or '@' in word or ':' in word:
              # Deal with punctuation.
              lead, middle, trail = '', word, ''
              for punctuation in TRAILING_PUNCTUATION:
                  if middle.endswith(punctuation):
keep keep keep keep replace keep keep keep keep keep
 Fixed a number of flake8 errors -- particularly around unused imports and local variables 
django/utils/html.py