  # PEP8 code linting, which we run on all commits.
  flake8==3.7.9
  flake8-tidy-imports==4.1.0
  pycodestyle==2.5.0
  
  # Sort and lint imports
  isort==5.4.2
 
</s> remove pycodestyle==2.5.0
 </s> add pycodestyle==2.6.0 </s> remove             expected = ['Must be a valid boolean.'.format(input_value)]
 </s> add             expected = ['Must be a valid boolean.'] </s> remove         'app_label': model._meta.app_label,
 </s> add  </s> remove             'lang_htmls': ["rest_framework/docs/langs/%s.html" % l for l in self.languages],
            'lang_intro_htmls': ["rest_framework/docs/langs/%s-intro.html" % l for l in self.languages],
 </s> add             'lang_htmls': ["rest_framework/docs/langs/%s.html" % language for language in self.languages],
            'lang_intro_htmls': ["rest_framework/docs/langs/%s-intro.html" % language for language in self.languages],
flake8==3.8.3
  # PEP8 code linting, which we run on all commits.
flake8==3.8.3
  flake8-tidy-imports==4.1.0
  pycodestyle==2.5.0
  
  # Sort and lint imports
  isort==5.4.2
keep replace keep keep keep keep keep
 Bump flake8 to 3.8.3 (#7521) 
requirements/requirements-codestyle.txt