While I think either could be used, my preference would be the one that explains that the shortest possible code to illustrate the problem is required.
At the GIS Stack Exchange the wording we use for that Custom Close Reason is:
Questions seeking help to debug/write/improve code must include the desired behavior, a specific problem or error and the shortest code (as formatted text, not pictures) necessary to reproduce it in the question itself. Providing a clear problem statement and evidence of a code attempt will help others to help you. See: How to create a Minimal, Complete, and Verifiable example.
I think the other choice of Too Broad is not unreasonable, because to answer a question with a lot of code in it and "something broken" in it will probably require you to ask yourself a number of questions as you try to answer and there may be a number of things wrong with the code. This all adds up to the question being too broad for focussed Q&A.