Replace all occurences of the variable in the status
Replace all occurences of the variable in the status

If you try to use maildir_counter_1 several times in your status-line, only the first one will be replaced right now. This means you can't use the maildir_counter for conditional status changes. With the added slash `/` before the pattern, the pattern will be replaced on all occurences.
tmux-plugins/tmux-maildir-counter,erickpintor/tmux-maildir-counter