documentation patch, fixes issue 490
documentation patch, fixes issue 490

Ignore-this: 8d899e15f9d1a657e9fc687e2f649f45

darcs-hash:20120111210832-76d51-fdc4239e23d78e6a202deb7781a247d5b52612b5

yzhou61/xmonad-contrib,yzhou61/xmonad-contrib,yzhou61/xmonad-contrib