gap filler ui does not support typing macrons into gaps

[jimbonothing64]

The gap filler ui does not support typing macrons into gaps.

Users cannot use Māori in strings etc, other languages affected too (if they use chars outside A-Z/a-z).

It looks like they are not included in the allowed characters, on this line:

moodle-qtype_coderunner/amd/src/ui_ace_gapfiller.js

Line 61 in 10532d8

const validChars = /[ !"#$%&'()*+,`\-./0-9:;<=>?@A-Z\[\]\\^_a-z{}|~]/;