Translations:Extension:Scribunto/Lua reference manual/1786/en

If preprocessor syntax such as template invocations and triple-brace arguments are included within an argument to $invoke1, they will not be expanded, after being passed to Lua, until their values are being requested in Lua. If certain special tags written in XML notation, such as $pre, $nowiki, $gallery and $ref, are included as arguments to $invoke2, then these tags will be converted to "strip markers" — special strings which begin with a delete character (ASCII 127), to be replaced with HTML after they are returned from #invoke.