[kddeisz]

Is that semantic difference documented anywhere? I’ve never heard of this before, would love to learn more.

[dragonwriter]

The official documentation for the implicit conversion protocol (which to_str is part of, as distinct from to_s) is here:

https://ruby-doc.org/core-3.0.2/doc/implicit_conversion_rdoc...

to_s is documented here:

https://ruby-doc.org/core-3.0.2/Object.html#method-i-to_s