wxm format: questions and answers are exported - unreadable by Maxima

[daute]

When saving to wxm, questions and answers are written as XML - this is not readable by Maxima, e.g.:

/* [wxMaxima: input   start ] */
askinteger(b);
/* [wxMaxima: input   end   ] */
/* [wxMaxima: question  start ] */
<math><st>Is </st><mi lisp="*var-tag*">b</mi><st> an </st><mi lisp="*var-tag*">integer</mi><st>?</st></math>
/* [wxMaxima: question  end   ] */
/* [wxMaxima: answer  start ] */
n;
/* [wxMaxima: answer  end   ] */

Other problematic commands are read() or asksign() (maybe more).
wxm files should be readable using load() or batch(). At least we write this in the manual. And that code is not readable by Maxima.

Maybe the questions and answers shouldn't be saved in a wxm file at all?