[plt-scheme] Duplicate code

Hi folks,

Inside of that let block is the custom code, and that let block is in
a couple of places.

(let* ([path (get-file-path editor)]
        [prev/timestamp (mem-timestamp path)]
        [fs/timestamp (fs-timestamp path)])

I'm wondering if there is any way to, or if it would even make sense,
to clean it up.

Thoughts?