04_traits/12_copy passes even without implementing wrapping add

[vitalie-cracan]

04_traits/12_copy passes even without implementing wrapping, because 02_basic_calculator/08_overflow added it to dev profile in Cargo.toml.

[c-git]

Interestingly until you mentioned it I never even thought that wasn't intentional. I "relied" on that for the test to pass and never looked at the official solutions to see they intended for use to use wrapping_add. I thought it was jut to give us practice implementing the Add trait.