- RunAtExpressionS. Using @ to generate command lists is no longer allowed; it's
too expensive and clumsy, and is no longer needed.
- "::" for newlines. This isn't needed, since the string is a Lua expression;
use "\n".
- FontCharAliases::ReplaceMarkers. This only makes sense for settext calls.
(The latter two will still be supported by settext directly.)