@abcdw An implementation for a SRFI does not have to be implementation agnostic, though that’s preferred.

The doctests here are the result of starting with Python-style doctests, then discussing that in the Guile list and finding this cleaner solution. Thanks to homoiconicity, we can write real code in the properties that then gets executed. This saves us from problems like the different quoting and multi-line stuff in Python-doctests.