More grousing about ZTOP mode

[Moon at MIT-AI (David A. Moon)]

In the version of zwei on system 30.4, with microcode 671, on LISP Machine Six:

The activation character (typically close parenthesis) does not echo until
after evaluation has been completed.

If I go back and edit something I have already evaluated, unless I am very careful
to make a completely fresh copy, when I hit c-return it starts reading it at a
completely random place and consequently gets an error.