[Reduce-algebra-developers] why command write of a list sometimes display the list on multiple lines on screen vs. all the list on same line?

[Nasser M. A. <nm...@12...>]

I have list, which in the attached script I print on to the terminal using

     write M;

Where M is the list.

Sometimes it displays on the terminal on one line as expected.
sometimes it displays each entry in the list on separate line.

Here is screen shot attached.

I added

off output;
linelength(1000);

At the top of my script in order to only see explicit output
from the "write" command and nothing else as the script runs.

But I still see numbers 1: 2: 3: etc... print at the start of the
script. why is that?

Please see the script file.red attached.

I run it as follows

       redcsl < file.red

I am using  Reduce (CSL, rev 6657), 10-Dec-2023  on Linux
which I build from source code. (Thanks to Francis Wright for
sending me link to the source tar file as it was not easy to
find it at sourceforge).

What do I need to change in the script so each list is printed
on one line, no matter how long it is?

Thanks
--Nasser