Address PR comments

Author: vkarak

reframe/frontend/printer.py

@@ -70,8 +70,8 @@ def status(self, status, message='', just=None, level=logging.INFO):
                 status = color.colorize(status, color.GREEN)
 
         final_msg = f'[ {status} ] '
-        if status_stripped in ('ABORT', 'OK', 'SKIP', 'FAIL', 'XFAIL',
-                               'XPASS', 'ERROR'):
+        if status_stripped in {'ABORT', 'OK', 'SKIP', 'FAIL', 'XFAIL',
+                               'XPASS', 'ERROR'}:
             if self._progress_count < self._progress_total:
                 self._progress_count += 1