anchor.diff:  // * `Process.packageConfig`
   // * `Isolate.packageRoot`
   // * `Isolate.packageRoot`
  -// * `Isolate.resolvePacakgeUri` of various inputs.
  +// * `Isolate.resolvePackageUri` of various inputs.
   // * A variable defined in a library loaded using a `package:` URI.
   //
   // The configurations all have URIs as `root`, `config` and `mainFile` strings,
  
positive.code:           "iroot": "%$scheme/pkgs/",
            "foo/": "%$scheme/pkgs/foo/",
            "foo/bar": "%$scheme/pkgs/foo/bar",
          });
      }
  
  
negative.code:           "foo/": "%http/sub/packages/foo/",
            "foo/bar": "%http/sub/packages/foo/bar",
            "foo.x": null,
            "bar/bar": "%http/sub/packages/bar/bar",
          });
      }
  
  