Errors doctests

[dmitrykleymenov]

For now there are doctests in exception.ex errors, f.e: https://github.com/elixir-lang/elixir/blob/main/lib/elixir/lib/exception.ex#L1087
But those doctests run nowhere and some of them will fall if do. I think it should be rewritten to pure docs instead of doctests(to don't confuse), or add every error module to exception_test.exs as doctest ArithmeticError and fix tests

[josevalim]

Yes, we should list those as doctests in exception_test.exs. Also note that Elixir main allows you to use … for partial matches in doctests. We should probably use that. For complex ones, we avoid using doctests. Would you like to send a PR?

[dmitrykleymenov]

Yes, i'll do it, thanks for the fast answer