This is another minor change but still makes a visual difference and will reduce the amount you have to scroll in your terminal by a little bit. Reasoning: 1. The for (0..src.data.reference_trace_len) loop will run at least once due to the src.data.reference_trace_len > 0 check above. 2. In all 3 branches of the if in that for it will print something. 3. The 3 strings of all of those prints already end in . Therefore, the extra try stderr.writeByte(''); is unnecessary.