fix precedence in portstat CLI (sonic-net#2874)

fix sonic-net#15439

Author: wenyiz2021

scripts/portstat

@@ -338,7 +338,7 @@ class Portstat(object):
                 print(table_as_json(table, header))
             else:
                 print(tabulate(table, header, tablefmt='simple', stralign='right'))
-        if multi_asic.is_multi_asic() or device_info.is_chassis() and not use_json:
+        if (multi_asic.is_multi_asic() or device_info.is_chassis()) and not use_json:
             print("\nReminder: Please execute 'show interface counters -d all' to include internal links\n")
 
     def cnstat_intf_diff_print(self, cnstat_new_dict, cnstat_old_dict, intf_list):
@@ -556,7 +556,7 @@ class Portstat(object):
                 print(table_as_json(table, header))
             else:
                 print(tabulate(table, header, tablefmt='simple', stralign='right'))
-        if multi_asic.is_multi_asic() or device_info.is_chassis() and not use_json:
+        if (multi_asic.is_multi_asic() or device_info.is_chassis()) and not use_json:
             print("\nReminder: Please execute 'show interface counters -d all' to include internal links\n")
 
 def main():

tests/portstat_test.py

@@ -192,7 +192,6 @@
 Reminder: Please execute 'show interface counters -d all' to include internal links
 """
 
-
 intf_invalid_asic_error = """ValueError: Unknown Namespace asic99"""
 
 intf_counters_detailed = """\