HACK: Move buggy lints to nursery

Those lints are trait_duplication_in_bounds and
type_repetition_in_bounds. I don't think those can be fixed on the
Clippy side alone, but need changes in the compiler. So let's move them
to nursery to get the sync through and then fix them on the rustc side.

Also adds a regression test that has to be fixed before they can be
moved back to pedantic.

Author: flip1995

clippy_lints/src/lib.register_nursery.rs

@@ -28,6 +28,8 @@ store.register_group(true, "clippy::nursery", Some("clippy_nursery"), vec![
     LintId::of(strings::STRING_LIT_AS_BYTES),
     LintId::of(suspicious_operation_groupings::SUSPICIOUS_OPERATION_GROUPINGS),
     LintId::of(trailing_empty_array::TRAILING_EMPTY_ARRAY),
+    LintId::of(trait_bounds::TRAIT_DUPLICATION_IN_BOUNDS),
+    LintId::of(trait_bounds::TYPE_REPETITION_IN_BOUNDS),
     LintId::of(transmute::TRANSMUTE_UNDEFINED_REPR),
     LintId::of(transmute::USELESS_TRANSMUTE),
     LintId::of(use_self::USE_SELF),

clippy_lints/src/lib.register_pedantic.rs

@@ -84,8 +84,6 @@ store.register_group(true, "clippy::pedantic", Some("clippy_pedantic"), vec![
     LintId::of(semicolon_if_nothing_returned::SEMICOLON_IF_NOTHING_RETURNED),
     LintId::of(stable_sort_primitive::STABLE_SORT_PRIMITIVE),
     LintId::of(strings::STRING_ADD_ASSIGN),
-    LintId::of(trait_bounds::TRAIT_DUPLICATION_IN_BOUNDS),
-    LintId::of(trait_bounds::TYPE_REPETITION_IN_BOUNDS),
     LintId::of(transmute::TRANSMUTE_PTR_TO_PTR),
     LintId::of(types::LINKEDLIST),
     LintId::of(types::OPTION_OPTION),

clippy_lints/src/trait_bounds.rs

@@ -35,7 +35,7 @@ declare_clippy_lint! {
     /// ```
     #[clippy::version = "1.38.0"]
     pub TYPE_REPETITION_IN_BOUNDS,
-    pedantic,
+    nursery,
     "Types are repeated unnecessary in trait bounds use `+` instead of using `T: _, T: _`"
 }
 
@@ -65,7 +65,7 @@ declare_clippy_lint! {
     /// ```
     #[clippy::version = "1.47.0"]
     pub TRAIT_DUPLICATION_IN_BOUNDS,
-    pedantic,
+    nursery,
     "Check if the same trait bounds are specified twice during a function declaration"
 }
 

tests/ui/trait_duplication_in_bounds.rs

@@ -95,4 +95,7 @@ trait FooIter: Iterator<Item = Foo> {
     }
 }
 
+// This should not lint
+fn impl_trait(_: impl AsRef<str>, _: impl AsRef<str>) {}
+
 fn main() {}

tests/ui/trait_duplication_in_bounds.stderr

@@ -67,5 +67,13 @@ LL |         Self: Iterator<Item = Foo>,
    |
    = help: consider removing this trait bound
 
-error: aborting due to 8 previous errors
+error: this trait bound is already specified in the where clause
+  --> $DIR/trait_duplication_in_bounds.rs:99:23
+   |
+LL | fn impl_trait(_: impl AsRef<str>, _: impl AsRef<str>) {}
+   |                       ^^^^^^^^^^
+   |
+   = help: consider removing this trait bound
+
+error: aborting due to 9 previous errors
 

tests/ui/type_repetition_in_bounds.rs

@@ -79,4 +79,7 @@ where
     u: U,
 }
 
+// This should not lint
+fn impl_trait(_: impl AsRef<str>, _: impl AsRef<str>) {}
+
 fn main() {}

tests/ui/type_repetition_in_bounds.stderr

@@ -19,5 +19,13 @@ LL |     Self: Copy + Default + Ord,
    |
    = help: consider combining the bounds: `Self: Clone + Copy + Default + Ord`
 
-error: aborting due to 2 previous errors
+error: this type has already been used as a bound predicate
+  --> $DIR/type_repetition_in_bounds.rs:83:43
+   |
+LL | fn impl_trait(_: impl AsRef<str>, _: impl AsRef<str>) {}
+   |                                           ^^^^^^^^^^
+   |
+   = help: consider combining the bounds: `impl AsRef<str>: AsRef<str> + AsRef<str>`
+
+error: aborting due to 3 previous errors