anchor.diff:          } else {
             result[file][line] += cnt;
           }
  -      }); 
  +      });
       } else {
         result[file] = v;
       }
  
positive.code:       }
        var filePath =
            "${_env["pkgRoot"]}"
            "/${import.substring(PACKAGE_PREFIX.length, import.length)}"; 
        return filePath;
      }
      if (import.startsWith(FILE_PREFIX)) {
  
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];
  