use repeat_n() where available

clippy_lints/src/doc/lazy_continuation.rs

@@ -57,7 +57,7 @@ pub(super) fn check(
                 diag.span_suggestion_verbose(
                     span.shrink_to_hi(),
                     "indent this line",
-                    std::iter::repeat(" ").take(indent).join(""),
+                    std::iter::repeat_n(" ", indent).join(""),
                     Applicability::MaybeIncorrect,
                 );
                 diag.help("if this is supposed to be its own paragraph, add a blank line");

clippy_utils/src/lib.rs

@@ -15,7 +15,6 @@
     clippy::missing_errors_doc,
     clippy::missing_panics_doc,
     clippy::must_use_candidate,
-    clippy::manual_repeat_n,
     rustc::diagnostic_outside_of_impl,
     rustc::untranslatable_diagnostic
 )]
@@ -89,7 +88,7 @@ use core::mem;
 use core::ops::ControlFlow;
 use std::collections::hash_map::Entry;
 use std::hash::BuildHasherDefault;
-use std::iter::{once, repeat};
+use std::iter::{once, repeat_n};
 use std::sync::{Mutex, MutexGuard, OnceLock};
 
 use itertools::Itertools;
@@ -3415,7 +3414,7 @@ fn maybe_get_relative_path(from: &DefPath, to: &DefPath, max_super: usize) -> St
             }))
             .join("::")
     } else {
-        repeat(String::from("super")).take(go_up_by).chain(path).join("::")
+        repeat_n(String::from("super"), go_up_by).chain(path).join("::")
     }
 }
 

tests/ui/manual_repeat_n.rs

@@ -23,8 +23,8 @@ mod foo_lib {
 fn foo() {
     let _ = match 1 {
         1 => foo_lib::iter(),
-        2 => std::iter::repeat([1, 2].as_slice()).take(2), /* Shouldn't lint because `external_lib::iter` doesn't
-                                                             * return `std::iter::RepeatN`. */
+        2 => std::iter::repeat([1, 2].as_slice()).take(2), /* Shouldn't lint because `external_lib::iter` doesn't */
+        // return `std::iter::RepeatN`.
         _ => todo!(),
     };
 }