Special macros.

The following special sequences have meaning only within an evaltrace environment.


\begin{evaltrace} ''++-->'' +--> ''++..>'' +..> \strut ''++_->'' +_-> ''++_.>'' ... ...'' +**> ''++%%>'' +%%> ''++.->'' +.-> \strut ''++_*>'' +_*> ''++_\end{evaltrace}