docs: def values(self):
          """
          Returns a mapping of items to their new values. The mapping includes only items whose value or raw string value
          has changed in the context.
          """
          report = {}
          for k, k_changes in self._changes.items():
              if len(k_changes) == 1:
                  report[k] = k_changes[0].new_value
              elif k_changes[0].old_value != k_changes[-1].new_value:
                  report[k] = k_changes[-1].new_value
          return report