set_display('ascii)$ fails to show matrices properly

[QMeqGR]

Choosing the menu entry Maxima-->Change 2d display to "ascii" does not display matrices correctly.

[daute]

An even more problematic lisp error results, if on sets display2d_unicode:'false too:

(%i3)	set_display('ascii); display2d_unicode:'false; matrix([a,b],[c,d]);
(%o1)                                ascii
(%o2)                                false
Maxima encountered a Lisp error:
 The value
   #\(
 is not of type
   SEQUENCE
 when binding SEQUENCE
Automatically continuing.
To enable the Lisp debugger set *debugger-hook* to nil.

(Using a current git version of Maxima and wxMaxima).

[daute]

See also issue: #1926

[QMeqGR]

In my first post, I'm using Latin Modern Mono font. I tried reverting to the default for "ASCII maths" font (Monospace 12) and the problem is no longer there.

After trying several different fonts, it seems that some mono-spaced fonts work and others don't.