Toggle mode line display of ERC activity (ERC Track minor mode).
With a prefix argument ARG, enable ERC Track minor mode if ARG is
positive, and disable it otherwise. If called from Lisp, enable
the mode if ARG is omitted or nil.
ERC Track minor mode is a global minor mode. It exists for the
sole purpose of providing the C-c C-SPC and C-c C-@ keybindings.
Make sure that you have enabled the track module, otherwise the
keybindings will not do anything useful. (fn &optional ARG)
Non-nil if Erc-Track minor mode is enabled.
See the command `erc-track-minor-mode' for a description of this minor mode.