[PATCH] rust: lock: Reflow long documentation line

[Ben Gooding <ben.gooding.dev@gmail.com>]

Suggested-by: Alice Ryhl <alice@ryhl.io>
Signed-off-by: Ben Gooding <ben.gooding.dev@gmail.com>
---
 rust/kernel/sync/lock.rs | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/rust/kernel/sync/lock.rs b/rust/kernel/sync/lock.rs
index 95466201dab7..04413f6f145a 100644
--- a/rust/kernel/sync/lock.rs
+++ b/rust/kernel/sync/lock.rs
@@ -72,8 +72,10 @@ pub unsafe trait Backend {
 
 /// A mutual exclusion primitive.
 ///
-/// Exposes one of the kernel locking primitives. Which one is exposed depends on the lock [backend](Backend)
-/// specified as the generic parameter `B`.
+/// Exposes one of the kernel locking primitives. Which one is exposed depends on the lock
+/// [backend] specified as the generic parameter `B`.
+/// 
+/// [backend]: Backend
 #[pin_data]
 pub struct Lock<T: ?Sized, B: Backend> {
     /// The kernel lock object.
-- 
2.34.1