docs: rust: clean up empty \\\ lines and improve rustdoc formatting

Remove unnecessary empty `\\\` lines in the rust docs. Also add linebreaks
in kernel::block::mq::Request to fix formatting

Suggested-by: Miguel Ojeda <[email protected]>
Link: Rust-for-Linux#1109
Signed-off-by: hridesh <[email protected]>

rust/kernel/block/mq/request.rs

@@ -22,15 +22,14 @@ use core::{
 ///
 /// There are four states for a request that the Rust bindings care about:
 ///
-/// A) Request is owned by block layer (refcount 0)
+/// A) Request is owned by block layer (refcount 0)\
 /// B) Request is owned by driver but with zero `ARef`s in existence
-///    (refcount 1)
+///    (refcount 1)\
 /// C) Request is owned by driver with exactly one `ARef` in existence
-///    (refcount 2)
+///    (refcount 2)\
 /// D) Request is owned by driver with more than one `ARef` in existence
 ///    (refcount > 2)
 ///
-///
 /// We need to track A and B to ensure we fail tag to request conversions for
 /// requests that are not owned by the driver.
 ///

rust/kernel/rbtree.rs

@@ -1031,7 +1031,6 @@ impl<K, V> Iterator for IterRaw<K, V> {
 
 /// A memory reservation for a red-black tree node.
 ///
-///
 /// It contains the memory needed to hold a node that can be inserted into a red-black tree. One
 /// can be obtained by directly allocating it ([`RBTreeNodeReservation::new`]).
 pub struct RBTreeNodeReservation<K, V> {