pwd ignores --help

[Humphrey van Polanen Petel]

commands
  ~$ pwd --help
and
  ~$ pwd --version
give
  bash: pwd: --: invalid option
  pwd: usage: pwd [-LP]
even though the man page says otherwise

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: bash 4.2-2ubuntu2
ProcVersionSignature: Ubuntu 3.2.0-34.53-generic 3.2.33
Uname: Linux 3.2.0-34-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu15
Architecture: amd64
Date: Sat Dec 15 10:31:22 2012
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
MarkForUpload: True
ProcEnviron:
 LANGUAGE=en_AU:en
 TERM=xterm
 PATH=(custom, user)
 LANG=en_AU.UTF-8
 SHELL=/bin/bash
SourcePackage: bash
UpgradeStatus: Upgraded to precise on 2012-05-01 (227 days ago)