Another example is interleaving the tab with a visible character. In 7.64, the tabs are expanded in channels and status window same as happens in the @custom windows. Unlike 7.63 and earlier where the "!" appear to touch each other in #channel and "Status Window". Both using /say and /echo

//echo -ag $str($chr(9) $+ $chr(33),234)

Unfortunately, giving the appearance of consecutive spaces inserting tabs between them causes long messages to more easily run afoul of the 510 server line length limit