anchor.diff:  
   # vim-go denpencies
   , asmfmt, delve, errcheck, godef, golint
  -, gomodifytags, gotags, gotools, motion
  +, gomodifytags, gotags, gotools, go-motion
   , gnused, reftools, gogetdoc, gometalinter
   , impl, iferr, gocode, gocode-gomod, go-tools
   }:
  
positive.code:       gotools
        iferr
        impl
        motion
        reftools
      ];
      in {
  
negative.code:       asmfmt
        delve
        errcheck
        go-motion
        go-tools
        gocode
        gocode-gomod
  