anchor.diff:        }
         var filePath =
             "${_env["pkgRoot"]}"
  -          "/${import.substring(PACKAGE_PREFIX.length, import.length)}"; 
  +          "/${import.substring(PACKAGE_PREFIX.length, import.length)}";
         return filePath;
       }
       if (import.startsWith(FILE_PREFIX)) {
  
positive.code:         } else {
            result[file][line] += cnt;
          }
        }); 
      } else {
        result[file] = v;
      }
  
negative.code: /// env.output.
  ///
  /// Returns a [Future] that completes as soon as all map entries have been
  /// emitted.
  Future lcov(Map hitmap) {
    var emitOne = (key) {
      var v = hitmap[key];
  