anchor.diff:  
     vista-vim = buildVimPluginFrom2Nix {
       pname = "vista-vim";
  -    version = "2020-01-15";
  +    version = "2020-01-30";
       src = fetchFromGitHub {
         owner = "liuchengxu";
         repo = "vista.vim";
  -      rev = "323591f0a45c59b8e94c2b7b0995530cb1a153af";
  -      sha256 = "1j1ijn1s9qirb55z2qyf0h48m00j6rsz45y1djkz55m63ckr576l";
  +      rev = "dd5769ec7a1e4c2c8927a6af4d26f88524faa60c";
  +      sha256 = "0jad10lx3lvfy56gnk50lpcbwyxk16yxm5i1p3r3zwsqra03kw5h";
       };
     };
   
  
positive.code: 
    vim-haskellConcealPlus = buildVimPluginFrom2Nix {
      pname = "vim-haskellConcealPlus";
      version = "2019-10-21";
      src = fetchFromGitHub {
        owner = "enomsg";
        repo = "vim-haskellConcealPlus";
        rev = "c76b73b17a5eaf4fd535b6bd1f533ea847fd20f7";
        sha256 = "01p9rjpp9g859axlq2mpj89dg3d7n40rmqx2x66aql87m8rzjmam";
      };
    };
  
  
negative.code: 
    iosvkem = buildVimPluginFrom2Nix {
      pname = "iosvkem";
      version = "2020-01-18";
      src = fetchFromGitHub {
        owner = "neutaaaaan";
        repo = "iosvkem";
        rev = "08e36b649c83eece7edbd2e04e42e077aebc78eb";
        sha256 = "0jawl7fs6wl3ny9vsmzqv5pnkv5nn6wj1nx7hzgdl41183958pni";
      };
    };
  
  