🪲 Improve error message for missing list in add-to and remove-from commands

[boryanagoncharenko]

This PR adds a specific error message when the user forgot to add a list at the end of the add-to and remove-from commands. Previously, we displayed a generic error that something is off with the line:
We detected that Add is being used on line 3 which is not allowed. Can you try looking for a missing or an extra character on your code?

Now we changed it to: We detected that part of the code seems to be missing from the Add on line 3. Can you try adding the what's missing

Fixes #5871

How to test
Go to level 3 and execute the following commands:

houses is Gryffindor, Hufflepuf, Ravenclaw, Slytherin
dislike is Slytherin
remove dislike from

and

houses is Gryffindor, Hufflepuf, Ravenclaw, Slytherin
dislike is Slytherin
remove dislike

Check that you agree with the error messages.

[jpelay]

Hello! It works perfectly! Just one tiny comment: can you fix the writing of this message?

"Can you try adding the what's missing" sounds a bit weird to me.

[boryanagoncharenko]

Hello! It works perfectly! Just one tiny comment: can you fix the writing of this message?

"Can you try adding the what's missing" sounds a bit weird to me.

Thanks for the feedback. I did not notice the error at all. I removed the the from the sentence.

[jpelay]

It's perfect now! Thanks!

[mergify]

Thank you for contributing! Your pull request is now going on the merge train (choo choo! Do not click update from main anymore, and be sure to allow changes to be pushed to your fork).

[mergify]

Thank you for contributing! Your pull request is now going on the merge train (choo choo! Do not click update from main anymore, and be sure to allow changes to be pushed to your fork).