Link vec doc to & reference

It is not always obvious that people could see the docs for `&`
especially for beginners, it also helps learnability.

1 files changed, 1 insertions, 1 deletions

diff --git a/library/alloc/src/vec.rs b/library/alloc/src/vec.rs
index b4ad238680f..5e6493c27ae 100644
--- a/library/alloc/src/vec.rs
+++ b/library/alloc/src/vec.rs
@@ -159,7 +159,7 @@ use crate::raw_vec::RawVec;
 /// # Slicing
 ///
 /// A `Vec` can be mutable. Slices, on the other hand, are read-only objects.
-/// To get a slice, use `&`. Example:
+/// To get a slice, use [`&`][prim@reference]. Example:
 ///
 /// ```
 /// fn read_slice(slice: &[usize]) {