Update README.md

sunli829 · sunli829 · commit efa838f39e72 · 2020-06-03T19:33:32.000+08:00
diff --git a/README.md b/README.md
@@ -34,7 +34,7 @@
 
 ## Safety
 
-This crate uses #![forbid(unsafe_code)] to ensure everything is implemented in 100% Safe Rust.
+This crate uses `#![forbid(unsafe_code)]` to ensure everything is implemented in 100% Safe Rust.
 
 ## Stability: Unstable & Experimental
 
