Update README.md

README.md

@@ -57,7 +57,7 @@ Please first localize the bug based on the issue statement, and then generate a
 
 Here is an example:
 
-```diff
+\`\`\`diff
 diff --git a/examples/server_async.py b/examples/server_async.py
 --- a/examples/server_async.py
 +++ b/examples/server_async.py
@@ -78,7 +78,7 @@ diff --git a/examples/server_sync.py b/examples/server_sync.py
 +    server = run_sync_server()
      server.shutdown()
 
-```
+\`\`\`
 """
 
 ds = load_dataset("rasdani/github-patches-10k-sample-sorted", split="train")