docs: add missing backticks in documentation

this improve readability of documentation.
enable associated clippy lint `doc_markdown`

src/api/k2v/item.rs

@@ -97,7 +97,7 @@ impl ReturnFormat {
 	}
 }
 
-/// Handle ReadItem request
+/// Handle `ReadItem` request
 #[allow(clippy::ptr_arg)]
 pub async fn handle_read_item(
 	ctx: ReqCtx,
@@ -201,7 +201,7 @@ pub async fn handle_delete_item(
 		.body(empty_body())?)
 }
 
-/// Handle ReadItem request
+/// Handle `ReadItem` request
 #[allow(clippy::ptr_arg)]
 pub async fn handle_poll_item(
 	ctx: ReqCtx,

src/api/k2v/range.rs

@@ -1,6 +1,6 @@
 //! Utility module for retrieving ranges of items in Garage tables
 //! Implements parameters (prefix, start, end, limit) as specified
-//! for endpoints ReadIndex, ReadBatch and DeleteBatch
+//! for endpoints `ReadIndex`, `ReadBatch` and `DeleteBatch`
 
 use std::sync::Arc;
 

src/api/k2v/router.rs

@@ -53,7 +53,7 @@ pub enum Endpoint {
 impl Endpoint {
 	/// Determine which S3 endpoint a request is for using the request, and a bucket which was
 	/// possibly extracted from the Host header.
-	/// Returns Self plus bucket name, if endpoint is not Endpoint::ListBuckets
+	/// Returns Self plus bucket name, if endpoint is not `Endpoint::ListBuckets`
 	pub fn from_request<T>(req: &Request<T>) -> Result<(Self, String), Error> {
 		let uri = req.uri();
 		let path = uri.path().trim_start_matches('/');