Apply suggestions from code review

Co-authored-by: Fridtjof Stoldt <xFrednet@gmail.com>

tests/ui/rename.rs

@@ -7,14 +7,12 @@
 #![allow(clippy::new_without_default)]
 #![allow(clippy::redundant_static_lifetimes)]
 #![allow(clippy::bind_instead_of_map)]
-#![allow(clippy::block_in_if_condition_expr)]
-#![allow(clippy::block_in_if_condition_stmt)]
 #![allow(clippy::box_collection)]
 #![allow(clippy::blocks_in_if_conditions)]
 #![allow(clippy::map_unwrap_or)]
 #![allow(clippy::unwrap_used)]
 #![allow(clippy::expect_used)]
-#![allow(clippy::for_loop_over_fallibles)]
+#![allow(clippy::for_loops_over_fallibles)]
 #![allow(clippy::useless_conversion)]
 #![allow(clippy::invisible_characters)]
 #![allow(clippy::single_char_add_str)]
@@ -34,9 +32,10 @@
 #![warn(clippy::new_without_default_derive)]
 #![warn(clippy::const_static_lifetime)]
 #![warn(clippy::cyclomatic_complexity)]
-#![warn(clippy::mem_discriminant_non_enum)]
 #![warn(clippy::option_and_then_some)]
 #![warn(clippy::box_vec)]
+#![warn(clippy::block_in_if_condition_expr)]
+#![warn(clippy::block_in_if_condition_stmt)]
 #![warn(clippy::option_map_unwrap_or)]
 #![warn(clippy::option_map_unwrap_or_else)]
 #![warn(clippy::result_map_unwrap_or_else)]