Move return_self_not_must_use to pedantic

src/tools/clippy/clippy_lints/src/lib.register_all.rs

@@ -247,7 +247,6 @@ store.register_group(true, "clippy::all", Some("clippy_all"), vec![
     LintId::of(reference::REF_IN_DEREF),
     LintId::of(regex::INVALID_REGEX),
     LintId::of(repeat_once::REPEAT_ONCE),
-    LintId::of(return_self_not_must_use::RETURN_SELF_NOT_MUST_USE),
     LintId::of(returns::LET_AND_RETURN),
     LintId::of(returns::NEEDLESS_RETURN),
     LintId::of(self_assignment::SELF_ASSIGNMENT),

src/tools/clippy/clippy_lints/src/lib.register_pedantic.rs

@@ -80,6 +80,7 @@ store.register_group(true, "clippy::pedantic", Some("clippy_pedantic"), vec![
     LintId::of(ranges::RANGE_PLUS_ONE),
     LintId::of(redundant_else::REDUNDANT_ELSE),
     LintId::of(ref_option_ref::REF_OPTION_REF),
+    LintId::of(return_self_not_must_use::RETURN_SELF_NOT_MUST_USE),
     LintId::of(semicolon_if_nothing_returned::SEMICOLON_IF_NOTHING_RETURNED),
     LintId::of(strings::STRING_ADD_ASSIGN),
     LintId::of(trait_bounds::TRAIT_DUPLICATION_IN_BOUNDS),

src/tools/clippy/clippy_lints/src/lib.register_suspicious.rs

@@ -16,7 +16,6 @@ store.register_group(true, "clippy::suspicious", Some("clippy_suspicious"), vec!
     LintId::of(methods::SUSPICIOUS_MAP),
     LintId::of(mut_key::MUTABLE_KEY_TYPE),
     LintId::of(octal_escapes::OCTAL_ESCAPES),
-    LintId::of(return_self_not_must_use::RETURN_SELF_NOT_MUST_USE),
     LintId::of(suspicious_trait_impl::SUSPICIOUS_ARITHMETIC_IMPL),
     LintId::of(suspicious_trait_impl::SUSPICIOUS_OP_ASSIGN_IMPL),
 ])

src/tools/clippy/clippy_lints/src/return_self_not_must_use.rs

@@ -38,7 +38,7 @@ declare_clippy_lint! {
     /// ```
     #[clippy::version = "1.59.0"]
     pub RETURN_SELF_NOT_MUST_USE,
-    suspicious,
+    pedantic,
     "missing `#[must_use]` annotation on a method returning `Self`"
 }
 

src/tools/clippy/tests/ui/return_self_not_must_use.rs

@@ -1,4 +1,5 @@
 #![crate_type = "lib"]
+#![warn(clippy::return_self_not_must_use)]
 
 #[derive(Clone)]
 pub struct Bar;

src/tools/clippy/tests/ui/return_self_not_must_use.stderr

@@ -1,5 +1,5 @@
 error: missing `#[must_use]` attribute on a method returning `Self`
-  --> $DIR/return_self_not_must_use.rs:7:5
+  --> $DIR/return_self_not_must_use.rs:8:5
    |
 LL |     fn what(&self) -> Self;
    |     ^^^^^^^^^^^^^^^^^^^^^^^
@@ -7,7 +7,7 @@ LL |     fn what(&self) -> Self;
    = note: `-D clippy::return-self-not-must-use` implied by `-D warnings`
 
 error: missing `#[must_use]` attribute on a method returning `Self`
-  --> $DIR/return_self_not_must_use.rs:17:5
+  --> $DIR/return_self_not_must_use.rs:18:5
    |
 LL | /     pub fn foo(&self) -> Self {
 LL | |         Self
@@ -15,7 +15,7 @@ LL | |     }
    | |_____^
 
 error: missing `#[must_use]` attribute on a method returning `Self`
-  --> $DIR/return_self_not_must_use.rs:20:5
+  --> $DIR/return_self_not_must_use.rs:21:5
    |
 LL | /     pub fn bar(self) -> Self {
 LL | |         self