Pro tip, the footer link https://doc.rust-lang.org/src/core/slice/mod.rs.html#2520 https://doc.rust-lang.org/src/core/slice/mod.rs.html#2520 is not a permalink

Pro tip, the footer link https://doc.rust-lang.org/src/core/slice/mod.rs.html#2520 https://doc.rust-lang.org/src/core/slice/mod.rs.html#2520 is not a permalink because it doesn't include a commit ID. It looks like it's already linking to the wrong thing now (and the article is only two months old), and I don't know what the right thing was meant to be. I suggest using GitHub permalinks in future, pinned to specific commits.