The author also forgot to mention that the new error output doesn't mix ` and ' anymore.
Ruby 3.3
> 'asd' + 1 (sitar-report):1:in `+': no implicit conversion ...
Ruby 3.4
> 'asd' + 1 (sitar-report):1:in 'String#+': no implicit conversion...
Ruby 3.3
> 'asd' + 1 (sitar-report):1:in `+': no implicit conversion ...
Ruby 3.4
> 'asd' + 1 (sitar-report):1:in 'String#+': no implicit conversion...
EDIT: https://en.wikipedia.org/wiki/Backtick#As_surrogate_of_apost... seems relevant