04d615b2d5e9: doc string for commands.pull() and push()

[Adrian Buehlmann]

Looking at:
http://hg.intevation.org/mercurial/crew/file/04d615b2d5e9/mercurial/commands.py

Line 2010:
    An optional identifier after # indicates a particular branch, tag,
    or changeset to pull.

What does that mean? Where does that # char go?

Is this meant for the URL? For example
http://[user@]host[:port]/[path][#branch|#tag|#changeset]
?

How does that relate to the -r option for the changeset case:
 -r --rev             a specific revision up to which you would like to pull
?

Same text appears on push:

Line 2065:
    An optional identifier after # indicates a particular branch, tag,
    or changeset to push.

Where is this # char expected to appear for push?