code: def installation_report(self, req, dist, what="Installed"):
          
          msg = "\n%(what)s %(eggloc)s%(extras)s"
          if self.multi_version and not self.no_report:
              msg += '\n' + self.__mv_warning
              if self.install_dir not in map(normalize_path, sys.path):
                  msg += '\n' + self.__id_warning
  
          eggloc = dist.location
          name = dist.project_name
          version = dist.version
          extras = ''  # TODO: self.report_extras(req, dist)
          return msg % locals()
docs: Helpful installation message for display to package users