demo file remarks



I would like to create demo files  *.dem which include comments on what is 
happening.
Is there a way to do this without the echo that presently occurs in, for 
example "demo.dem"
which has the code at the top:
---
title(exp):=disp(dpart(exp))$
(title("a classical textbook example of differentiation"))$
x^x^x;
diff(%,x);
(title("differentiation of a nested function"))$
--------------------
and the Xmaxima output:

(%i73) demo("demo")$
batching #pC:/PROGRA~1/MAXIMA~3.0/share/maxima/5.14.0/demo/demo.dem

 At the _ prompt, type ';' followed by enter to get next demo
(%i74)                  title(exp) := disp(dpart(exp))
_;
(%i75)      title(a classical textbook example of differentiation)
               """""""""""""""""""""""""""""""""""""""""""""""""
               "a classical textbook example of differentiation"
               """""""""""""""""""""""""""""""""""""""""""""""""
( followed by example 1...)
----------------
TIA
Ted Woollett