/usr/share/ircII/script/msg is in ircii 20060725-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 | # $eterna: msg,v 1.2 2001/08/12 15:57:11 mrg Exp $
#
# Something handy I found in The_Edge's .ircrc: serial 567
# updated for 2.2.2
# Adapted to use $D
#
on #-311 567 * ^assign te.last_whois $1
bind ^u erase_line
bind meta2-? parse type ^u/msg $te.last_whois
bind meta2-! parse type ^u/msg $D
bind meta2-. parse type ^u/msg $.
bind meta2-, parse type ^u/msg $,
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