anchor.diff:    parallel = {
       source = {
         remotes = ["https://rubygems.org"];
  -      sha256 = "0qv2yj4sxr36ga6xdxvbq9h05hn10bwcbkqv6j6q1fiixhsdnnzd";
  -      type = "gem";
  -    };
  -    version = "1.12.0";
  +      sha256 = "01hj8v1qnyl5ndrs33g8ld8ibk0rbcqdpkpznr04gkbxd11pqn67";
  +      type = "gem";
  +    };
  +    version = "1.12.1";
     };
     parallel_tests = {
       dependencies = ["parallel"];
  
positive.code:   diff-lcs = {
      source = {
        remotes = ["https://rubygems.org"];
        sha256 = "1vf9civd41bnqi6brr5d9jifdw73j9khc6fkhfl1f8r9cpkdvlx1";
        type = "gem";
      };
      version = "1.2.5";
    };
    domain_name = {
      dependencies = ["unf"];
      source = {
        remotes = ["https://rubygems.org"];
        sha256 = "0rg7gvp45xmb5qz8ydp7ivw05hhplh6k7mbawrpvkysl2c77w5xx";
        type = "gem";
      };
      version = "0.5.20160826";
    };
    ffi = {
      source = {
        remotes = ["https://rubygems.org"];
        sha256 = "1nkcrmxqr0vb1y4rwliclwlj2ajsi4ddpdx2gvzjy0xbkk5iqzfp";
        type = "gem";
      };
      version = "1.9.14";
    };
    gherkin = {
      source = {
        remotes = ["https://rubygems.org"];
        sha256 = "1ripjv97hg746xszx9isal8z8vrlb98asc2rdxl291b3hr6pj0pr";
        type = "gem";
      };
      version = "4.0.0";
    };
    govuk-lint = {
      dependencies = ["rubocop" "rubocop-rspec" "scss_lint"];
  
negative.code:   power_assert = {
      source = {
        remotes = ["https://rubygems.org"];
        sha256 = "0h0s1clasynlbk3782801c61yx24pdv959fpw53g5yl8gxqj34iz";
        type = "gem";
      };
      version = "1.1.1";
    };
    powerpack = {
      source = {
  