erc-track-shorten-names
erc-track-shorten-names is a compiled Lisp function in `erc-track.el
'.
(erc-track-shorten-names CHANNEL-NAMES)
Call `erc-unique-channel-names' with the correct parameters.
This function is a good value for `erc-track-shorten-function'.
The list of all channels is returned by `erc-all-buffer-names'.
CHANNEL-NAMES is the list of active channel names.
Only channel names longer than `erc-track-shorten-cutoff' are
actually shortened, and they are only shortened to a minimum
of `erc-track-shorten-start' characters.