fix warning

Signed-off-by: Andy Lok <andylokandy@hotmail.com>

Author: andylokandy

Cargo.lock

@@ -18,5 +18,4 @@ tikv-client = { git = "https://github.com/tikv/client-rust.git", rev = "8875c96"
 
 [patch.crates-io]
 raft-proto = { git = "https://github.com/tikv/raft-rs", rev="95c532612ee6a83591fce9a8b51d6afe87b58835"}
-protobuf-codegen = { git = "https://github.com/pingcap/rust-protobuf", rev="82b49fea7e696fd647b5aca0a6c6ec944eab3189" }
 protobuf = { git = "https://github.com/pingcap/rust-protobuf", rev="82b49fea7e696fd647b5aca0a6c6ec944eab3189" }

Cargo.toml

@@ -87,7 +87,8 @@ mod ffi {
             client: &TransactionClient,
         ) -> Result<Box<Transaction>>;
 
-        fn transaction_get(transaction: &mut Transaction, key: &CxxString) -> Result<OptionalValue>;
+        fn transaction_get(transaction: &mut Transaction, key: &CxxString)
+            -> Result<OptionalValue>;
 
         fn transaction_get_for_update(
             transaction: &mut Transaction,
@@ -160,7 +161,7 @@ fn raw_client_new(pd_endpoints: &CxxVector<CxxString>) -> Result<Box<RawKVClient
 
     Ok(Box::new(RawKVClient {
         rt: runtime,
-        inner: block_on(tikv_client::RawClient::new(pd_endpoints,None))?,
+        inner: block_on(tikv_client::RawClient::new(pd_endpoints, None))?,
     }))
 }
 
@@ -173,7 +174,7 @@ fn transaction_client_new(pd_endpoints: &CxxVector<CxxString>) -> Result<Box<Tra
         .collect::<std::result::Result<Vec<_>, _>>()?;
 
     Ok(Box::new(TransactionClient {
-        inner: block_on(tikv_client::TransactionClient::new(pd_endpoints,None))?,
+        inner: block_on(tikv_client::TransactionClient::new(pd_endpoints, None))?,
     }))
 }