writing-results line shows the destination directory

Co-Authored-By: Claude <noreply@anthropic.com>

evalharness/cli.py

@@ -571,7 +571,8 @@ def _cmd_eval_run(args) -> int:
             if args.out:
                 report.save(args.out)
             if out_dir:
-                _emit('writing results')
+                _emit(f'writing results -> {out_dir}/{name}/' if out_dir
+                      else 'writing results')
                 from pathlib import Path as _P
 
                 bench_dir = _P(out_dir) / name