in management-cluster-http/src/main/scala/org/apache/pekko/management/cluster/scaladsl/ClusterHttpManagementRoutes.scala [335:340]
def decoded(path: Uri.Path, current: StringBuilder): String =
path match {
case Path.Slash(next) => decoded(next, current += '/')
case Path.Segment(head, tail) => decoded(tail, current ++= head)
case Path.Empty => current.result()
}