Hard to read diff

[rluvaton]

Currently, it's tough to read the diff in case of assertion failure, it would be great if it could use pretty_assertions under the hood or similar

[joelparkerhenderson]

Super idea. I'll take a look. What do you think about owo-colors? https://crates.io/crates/owo-colors

Do you code rust? I would be fully open to PRs that add owo-colors, or a color solution that can work with no_std and also lets the user opt-in/opt-out via environment variable. (This is important because the asserts must be able to run in no_std, and must also be able to run in line-oriented CI/CD servers which compare line output snapshots)