diff --git a/README.md b/README.md
index bbba26ee..5065b906 100644
--- a/README.md
+++ b/README.md
@@ -90,6 +90,8 @@ cargo +nightly bench --all-features <bench-case-name>
 cargo run --release --package stress -- --help
 ```
 
+<!-- hello -->
+
 ## License
 
 Copyright (c) 2017-present, PingCAP, Inc. Released under the Apache 2.0 license. See [LICENSE](https://github.com/tikv/raft-engine/blob/master/LICENSE) for details.
diff --git a/rustfmt.toml b/rustfmt.toml
index b2715b26..fec4fec0 100644
--- a/rustfmt.toml
+++ b/rustfmt.toml
@@ -1 +1,3 @@
 wrap_comments = true
+
+