--
-A clippy::redundant_closure_call
-A clippy::writeln_empty_string
-A clippy::write_with_newline
-A clippy::println_empty_string
-A clippy::print_with_newline
-A clippy::let_and_return
-A clippy::needless_lifetimes
-A clippy::upper_case_acronyms
-A clippy::unused_unit
-A clippy::manual_flatten
-A clippy::clone_on_copy
-A clippy::comparison_to_empty
-A clippy::try_err
-A clippy::unit_arg # does badly with if_chain, at least