GitLab

Gives some info about debugging.

Some inconsistencies in how the line numbers were saved.

assignment -> indexing

If there is no line or column number to print, the students have a default.

Added a case for null objects.

The specification of teal-2 is not present.

Otherwise it's too difficult to analyse.

These files aren't necessary for publication to the students

We use a tree box type to prevent problems with TEALs type checking...