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- Gives the right error message when using `kubectl delete` a wrong resource. ([#83825](https://github.com/kubernetes/kubernetes/pull/83825), [@zhouya0](https://github.com/zhouya0))
- If a bad flag is supplied to a kubectl command, only a tip to run `--help` is printed, instead of the usage menu.  Usage menu is printed upon running `kubectl command --help`. ([#82423](https://github.com/kubernetes/kubernetes/pull/82423), [@sallyom](https://github.com/sallyom))

  - go_gc_heap_allocs_objects_total
  - go_gc_heap_frees_by_size_bytes
  - go_gc_heap_frees_bytes_total
  - go_gc_heap_frees_objects_total
  - go_gc_heap_goal_bytes
  - go_gc_heap_objects_objects
  - go_gc_heap_tiny_allocs_objects_total
  - go_gc_pauses_seconds
  - go_memory_classes_heap_free_bytes
  - go_memory_classes_heap_objects_bytes
  - go_memory_classes_heap_released_bytes
  - go_memory_classes_heap_stacks_bytes