anchor.diff:    meta = with lib; {
       description = "Efficiently update, split, and rearrange git commits";
       homepage = https://github.com/mystor/git-revise;
  +    changelog = "https://github.com/mystor/git-revise/blob/${version}/CHANGELOG.md";
       license = licenses.mit;
       maintainers = with maintainers; [ emily ];
     };
  
positive.code: 
  buildPythonPackage rec {
    pname = "git-revise";
    version = "0.4.2";
  
    src = fetchPypi {
      inherit pname version;
      sha256 = "1mq1fh8m6jxl052d811cgpl378hiq20a8zrhdjn0i3dqmxrcb8vs";
    };
  
    disabled = !(pythonAtLeast "3.6");
  
    checkInputs = [ tox pytest pylint mypy black ];
  
  
negative.code: { lib
  , buildPythonPackage
  , fetchPypi
  , pythonOlder
  , tox
  , pytest
  , pylint
  