Fix fmt

Author: shenkeyao

fault-proof/src/lib.rs

@@ -161,7 +161,7 @@ where
         let latest_game_index = game_count - U256::from(1);
         // TODO (Keyao) Reduce the logs for game count.
         // <https://app.asana.com/1/1208976916964769/project/1209392461754458/task/1212777441857737?focus=true>
-        // 
+        //
         // The logged index is game count - 1.
         tracing::info!("Latest game index: {:?}", latest_game_index);