You've been on these forums long enough to know how, why and where mIRC strips spaces... and have seen 2 dozen threads dedicated to various work-arounds.
To be brief, there are few circomstances where you can display lines with multiple spaces.
/play and /loadbuf can echo lines with many spaces, from a file.
You can sometimes $replace spaces with $chr(160)
&binvars can manipulate strings that have sequences of spaces in them.
- Raccoon
