See https://docs.rs/crate/clippy/0.0.88 for an example, and compare to https://github.com/Manishearth/rust-clippy . In the latter, names like `block_in_if_condition_expr` show up correctly. docs.rs interprets the underscores as markup for italics, italicizing the `in` and the `condition`. This likely represents a difference in markdown dialect from what most packages expect.