add trailing empty line

Signed-off-by: Alex.F <[email protected]>

Author: gfreezy

tikv-client-proto/proto/coprocessor_v2.proto

@@ -30,4 +30,4 @@ message RawCoprocessorResponse {
     // Error message for cases like if no coprocessor with a matching name is found
     // or on a version mismatch between plugin_api and the coprocessor.
     string other_error = 4;
-}
+}

tikv-client-proto/proto/tikvpb.proto

@@ -225,4 +225,4 @@ message BatchCommandsEmptyRequest {
 message BatchCommandsEmptyResponse {
     // ID of the test request.
     uint64 test_id = 1;
-}
+}