added some more documentation

terminatorlib/plugins/command_notify.py

@@ -7,8 +7,12 @@ depends on https://github.com/GNOME/vte/blob/vte-0-58/src/vte.sh (which has to
 be added to /etc/profile.d) and you need to ensure `__vte_prompt_command` is
 executed on `PROMPT_COMMAND` in Bash or in `precmd_functions` in Zsh.
 
+This plugin also relies on the widely distributed vte patches to wire in a 
+`notification_received` signal to catch the OSC escape sequence in the prompt
+
 Code is adapted from https://github.com/x4lldux/terminator-long-cmd-notify
 Thanks to @xll4dux on Github for the code and his permission to use it
+
 """
 import terminatorlib.plugin as plugin
 from terminatorlib.terminator import Terminator