* [`map_err_ignore`] [#5998](https://github.com/rust-lang/rust-clippy/pull/5998)
* [`rc_buffer`] [#6044](https://github.com/rust-lang/rust-clippy/pull/6044)
* [`to_string_in_display`] [#5831](https://github.com/rust-lang/rust-clippy/pull/5831)
-* [`single_char_push_str`] [#5881](https://github.com/rust-lang/rust-clippy/pull/5881)
+* `single_char_push_str` [#5881](https://github.com/rust-lang/rust-clippy/pull/5881)
### Moves and Deprecations
[`cognitive_complexity`]: https://rust-lang.github.io/rust-clippy/master/index.html#cognitive_complexity
[`collapsible_if`]: https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[`comparison_chain`]: https://rust-lang.github.io/rust-clippy/master/index.html#comparison_chain
+[`comparison_to_empty`]: https://rust-lang.github.io/rust-clippy/master/index.html#comparison_to_empty
[`copy_iterator`]: https://rust-lang.github.io/rust-clippy/master/index.html#copy_iterator
[`create_dir`]: https://rust-lang.github.io/rust-clippy/master/index.html#create_dir
[`crosspointer_transmute`]: https://rust-lang.github.io/rust-clippy/master/index.html#crosspointer_transmute
[`extend_from_slice`]: https://rust-lang.github.io/rust-clippy/master/index.html#extend_from_slice
[`extra_unused_lifetimes`]: https://rust-lang.github.io/rust-clippy/master/index.html#extra_unused_lifetimes
[`fallible_impl_from`]: https://rust-lang.github.io/rust-clippy/master/index.html#fallible_impl_from
+[`field_reassign_with_default`]: https://rust-lang.github.io/rust-clippy/master/index.html#field_reassign_with_default
[`filetype_is_file`]: https://rust-lang.github.io/rust-clippy/master/index.html#filetype_is_file
[`filter_map`]: https://rust-lang.github.io/rust-clippy/master/index.html#filter_map
[`filter_map_next`]: https://rust-lang.github.io/rust-clippy/master/index.html#filter_map_next
[`for_loops_over_fallibles`]: https://rust-lang.github.io/rust-clippy/master/index.html#for_loops_over_fallibles
[`forget_copy`]: https://rust-lang.github.io/rust-clippy/master/index.html#forget_copy
[`forget_ref`]: https://rust-lang.github.io/rust-clippy/master/index.html#forget_ref
+[`from_iter_instead_of_collect`]: https://rust-lang.github.io/rust-clippy/master/index.html#from_iter_instead_of_collect
[`future_not_send`]: https://rust-lang.github.io/rust-clippy/master/index.html#future_not_send
[`get_last_with_len`]: https://rust-lang.github.io/rust-clippy/master/index.html#get_last_with_len
[`get_unwrap`]: https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[`manual_async_fn`]: https://rust-lang.github.io/rust-clippy/master/index.html#manual_async_fn
[`manual_memcpy`]: https://rust-lang.github.io/rust-clippy/master/index.html#manual_memcpy
[`manual_non_exhaustive`]: https://rust-lang.github.io/rust-clippy/master/index.html#manual_non_exhaustive
+[`manual_ok_or`]: https://rust-lang.github.io/rust-clippy/master/index.html#manual_ok_or
[`manual_range_contains`]: https://rust-lang.github.io/rust-clippy/master/index.html#manual_range_contains
[`manual_saturating_arithmetic`]: https://rust-lang.github.io/rust-clippy/master/index.html#manual_saturating_arithmetic
[`manual_strip`]: https://rust-lang.github.io/rust-clippy/master/index.html#manual_strip
[`manual_unwrap_or`]: https://rust-lang.github.io/rust-clippy/master/index.html#manual_unwrap_or
[`many_single_char_names`]: https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[`map_clone`]: https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
+[`map_collect_result_unit`]: https://rust-lang.github.io/rust-clippy/master/index.html#map_collect_result_unit
[`map_entry`]: https://rust-lang.github.io/rust-clippy/master/index.html#map_entry
[`map_err_ignore`]: https://rust-lang.github.io/rust-clippy/master/index.html#map_err_ignore
[`map_flatten`]: https://rust-lang.github.io/rust-clippy/master/index.html#map_flatten
[`redundant_pub_crate`]: https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pub_crate
[`redundant_static_lifetimes`]: https://rust-lang.github.io/rust-clippy/master/index.html#redundant_static_lifetimes
[`ref_in_deref`]: https://rust-lang.github.io/rust-clippy/master/index.html#ref_in_deref
+[`ref_option_ref`]: https://rust-lang.github.io/rust-clippy/master/index.html#ref_option_ref
[`regex_macro`]: https://rust-lang.github.io/rust-clippy/master/index.html#regex_macro
[`repeat_once`]: https://rust-lang.github.io/rust-clippy/master/index.html#repeat_once
[`replace_consts`]: https://rust-lang.github.io/rust-clippy/master/index.html#replace_consts
[`should_assert_eq`]: https://rust-lang.github.io/rust-clippy/master/index.html#should_assert_eq
[`should_implement_trait`]: https://rust-lang.github.io/rust-clippy/master/index.html#should_implement_trait
[`similar_names`]: https://rust-lang.github.io/rust-clippy/master/index.html#similar_names
+[`single_char_add_str`]: https://rust-lang.github.io/rust-clippy/master/index.html#single_char_add_str
[`single_char_pattern`]: https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
-[`single_char_push_str`]: https://rust-lang.github.io/rust-clippy/master/index.html#single_char_push_str
[`single_component_path_imports`]: https://rust-lang.github.io/rust-clippy/master/index.html#single_component_path_imports
[`single_element_loop`]: https://rust-lang.github.io/rust-clippy/master/index.html#single_element_loop
[`single_match`]: https://rust-lang.github.io/rust-clippy/master/index.html#single_match