Joe Politz

Just wanted to comment that I tried this out today and, at least for spreadsheets, the full URL is currently accepted, and in fact the Bootstrap starter code already does...

(You can even kind of tell the regex they use; if you edit the URL prefix it fails but it can have any suffix :-)) 

Yup, and plain ID works too, checked and updated (https://github.com/brownplt/pyret-docs/commit/6d85789a995abf8f6375cc7516406987315972d1)

Oh let me double-check before you do that. I thought that `load-spreadsheet` was _the_ `load-spreadsheet`.

I think this modal (and others) could use a designer's eye, especially a newcomer/outsider, this sounds great. Seeing a PR with a redesign would be great. Generally for improvements like...

That document and your thoughts are not presumptuous, they are spectacular! Thank you so much for writing all of this down, what a gift! I put some comments in the...

I don't understand what a `caller-loc` is and where it gets stored, etc. What does it mean to use it when throwing errors? I'm not really concerned with the stack...

> Error messages contain a source location that says where they occurred. Errors don't always contain a location (or the ideal location). arity-mismatch only knows the location of the callee,...

> When do errors contain a "location that isn't ideal"? arity mismatch contains the location of the callee and not the caller. That's not ideal; ideal would be both. >...

Are there heuristics other than figuring out which location the caller is at?