From ea3839ae18ff5850e35820017a583235722e8f7f Mon Sep 17 00:00:00 2001
From: Alejandra Gonzalez <blyxyas@gmail.com>
Date: Tue, 30 Dec 2025 14:15:00 +0100
Subject: [PATCH] Remove a single allocation on doc lints

---
 clippy_lints/src/doc/mod.rs | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/clippy_lints/src/doc/mod.rs b/clippy_lints/src/doc/mod.rs
index 120da92da944..5ff66f10a3fe 100644
--- a/clippy_lints/src/doc/mod.rs
+++ b/clippy_lints/src/doc/mod.rs
@@ -869,10 +869,12 @@ fn check_attrs(cx: &LateContext<'_>, valid_idents: &FxHashSet<String>, attrs: &[
         }),
         true,
     );
-    let mut doc = fragments.iter().fold(String::new(), |mut acc, fragment| {
-        add_doc_fragment(&mut acc, fragment);
-        acc
-    });
+
+    let mut doc = String::with_capacity(fragments.iter().map(|frag| frag.doc.as_str().len() + 1).sum());
+
+    for fragment in &fragments {
+        add_doc_fragment(&mut doc, fragment);
+    }
     doc.pop();
 
     if doc.trim().is_empty() {