/usr/share/games/openttd/scripts/autoexec.scr.example is in openttd-data 1.5.3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | # send chat messages from the console with
# ] s i love this chat
#
alias s "say %!"
|