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Enhanced Karel-the-robot clone

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Highlighting of lines in the editor is done by adding extra highlighting instructions in the user code; these are included in the number of steps. They should not be.

I need to update to use the newest version of CodeMirror as the version I use is very old (and actually has a security issue, which is not of importance...

The Brython version currently used is quite old. Much progress has been made with Brython which supports a much newer version of Python and is also faster. I will use...

When escaping the maze, instead of the standard message ![image](https://github.com/user-attachments/assets/29f26675-e673-4ee2-9854-244c397a9ed4) it might be useful to have a custom one, like "Congratulations, you have successfully escaped the maze."

With the world "Around 1", the following: for step in range(4): while not wall_in_front(): move() turn_left() is a solution ... but the message box displays "undefined".

bug

The error shown here is due to writing `AND` instead of `and`. This might be fairly easy to check. ![image](https://github.com/user-attachments/assets/44bedcb3-0e08-4b68-a8c5-812130871980)

I'm doing the MAZE challenge, and although I have seen the error in the hurdles challenge too - I never figured out how the problem got rectified. After multiple attempts,...