💻 Shorten our error messages

[MarleenGilsing]

Our error messages might be longer than necessary. For instance:

This error message doesn't need 'at position 13'. I don't think students know what we mean by position 13 anyway and the mistake is highlighted nowadays, so the student will instantly see what they did wrong in line 1.

I would even argue that 'The code you entered is not valid Hedy code.' is unnecessary information.

I think the shorter the message, the bigger change of a kid actually reading the message, so maybe we can take a look at the messages and tweak all the extra info.

[Felienne]

Great remark! I have made similar remarks in #4729 Let's discuss this at the hackathon?