As we know /echo -e adds line separators around echoed line and -g prevents the line from being logged. Using both (-eg)mIRC still writes a single line separator (default: '-') to the logfile . Of course this doesn't happen when logging is turned off.

Nice find for sure!

I tried /echo -eg again in command line and it actually writes both line separators ('-') to log file with -eg options. I'm sure I got only one yesterday when /echo -eg was in script. Odd...