anchor.diff:  wcwidth,https://github.com/jquast/wcwidth/blob/master/LICENSE.txt,MIT
   webencodings,https://github.com/gsnedders/python-webencodings/blob/master/LICENSE,BSD-3
   widgetsnbextension,https://github.com/jupyter-widgets/ipywidgets/blob/master/widgetsnbextension/LICENSE,BSD-3
  +zipp,https://github.com/jaraco/zipp/blob/master/LICENSE,MIT
  
positive.code: mistune,https://github.com/lepture/mistune/blob/master/LICENSE,BSD-3
  mock,https://github.com/testing-cabal/mock/blob/master/LICENSE.txt,BSD-2
  monotonic,https://github.com/atdt/monotonic/blob/master/LICENSE,Apache 2.0
  nbconvert,https://github.com/jupyter/nbconvert/blob/master/LICENSE,BSD-3
  nbformat,https://github.com/jupyter/nbformat/blob/master/COPYING.md,BSD-3
  notebook,https://github.com/jupyter/notebook/blob/master/COPYING.md,BSD-3
  
negative.code: itables,https://github.com/mwouts/itables/blob/master/LICENSE,MIT
  jedi,https://github.com/davidhalter/jedi/blob/master/LICENSE.txt,MIT
  joblib,https://github.com/joblib/joblib/blob/master/LICENSE.txt,BSD-3
  js-regex,https://github.com/Zac-HD/js-regex/blob/master/LICENSE,Mozilla 2.0
  jsonschema,https://github.com/Julian/jsonschema/blob/master/COPYING,MIT
  jupyter,https://github.com/jupyter/jupyter/blob/master/LICENSE,BSD-3
  jupyter-client,https://github.com/jupyter/jupyter_client/blob/master/COPYING.md,BSD-3
  