anchor.diff:  
     traces-vim = buildVimPluginFrom2Nix {
       pname = "traces-vim";
  -    version = "2020-01-22";
  +    version = "2020-06-19";
       src = fetchFromGitHub {
         owner = "markonm";
         repo = "traces.vim";
  -      rev = "4d3858eb060a1fd2213b075a707d39cbb118ae3e";
  -      sha256 = "0qny9z459x7hp5y43iivws2m312clacysdy1nnb3cr1fyhw9pflx";
  +      rev = "ac40d8c89b9eba8eefdbb8383eba54ab98c13bd5";
  +      sha256 = "16alf05qzf572nj7dbw9c2s6vxq2raz2kj61jjvdrcfplr0nqqha";
       };
       meta.homepage = "https://github.com/markonm/traces.vim/";
     };
  
positive.code: 
    vim-racer = buildVimPluginFrom2Nix {
      pname = "vim-racer";
      version = "2020-03-06";
      src = fetchFromGitHub {
        owner = "racer-rust";
        repo = "vim-racer";
        rev = "950b78f36e568134f5dcabc9a146c61e0084d220";
        sha256 = "0k62yybilh2052w6zfscw7daz7y1qnqv1311zngjim5z8xmp7j1l";
      };
      meta.homepage = "https://github.com/racer-rust/vim-racer/";
    };
  
negative.code: 
    vim-markdown = buildVimPluginFrom2Nix {
      pname = "vim-markdown";
      version = "2020-06-16";
      src = fetchFromGitHub {
        owner = "plasticboy";
        repo = "vim-markdown";
        rev = "c179316755bccb44115d031d720037dc58d75e6c";
        sha256 = "0ljvlh3glylm9q9fkdq6162i4jsxgyik13wcyjg44vrsgdim02qa";
      };
      meta.homepage = "https://github.com/plasticboy/vim-markdown/";
    };
  