alloc: Use intra doc links for the reserve function

The sentence exists to highlight the existence of a
performance footgun of repeated calls of the
reserve_exact function.

1 files changed, 3 insertions, 1 deletions

diff --git a/library/alloc/src/string.rs b/library/alloc/src/string.rs
index 5411316f55a..a6b8bdef89c 100644
--- a/library/alloc/src/string.rs
+++ b/library/alloc/src/string.rs
@@ -1035,7 +1035,9 @@ impl String {
     ///
     /// Note that the allocator may give the collection more space than it
     /// requests. Therefore, capacity can not be relied upon to be precisely
-    /// minimal. Prefer `reserve` if future insertions are expected.
+    /// minimal. Prefer [`reserve`] if future insertions are expected.
+    ///
+    /// [`reserve`]: String::reserve
     ///
     /// # Errors
     ///