erc-change-user-nickname
erc-change-user-nickname is a compiled Lisp function in `erc.el
'.
(erc-change-user-nickname USER NEW-NICK)
This function is for internal use only.
Changes the nickname of USER to NEW-NICK in the
`erc-server-users' hash table. The `erc-channel-users' lists of
other buffers are also changed.