Escape paths when adding them to toml

[eopb]

Problem

This code can panic

cargo-override/src/toml.rs

Line 71 in 79e6cb2

todo!("We haven't escaped anything, so we can't be sure this will parse")

[epage]

Shouldn't the correct approach be to create the tables natively in toml_edit, rather than generating it and then parsing it?

[eopb]

Yup, that's the plan. I was just struggling to get the exact formatting that I was after when I first tried this, but I expect it's very much doable