a string that is the concatenation of the individual rune values
converted to strings.

<pre>
string([]rune{0x767d, 0x9d6c, 0x7fd4})   // "\u767d\u9d6c\u7fd4" == "白鵬翔"
string([]rune{})                         // ""
string([]rune(nil))                      // ""

type runes []rune
string(runes{0x767d, 0x9d6c, 0x7fd4})    // "\u767d\u9d6c\u7fd4" == "白鵬翔"

type myRune rune

- `kubectl apply  -f <file> --prune -n <namespace>` should prune all resources not defined in the file in the cli specified namespace. ([#85613](https://github.com/kubernetes/kubernetes/pull/85613), [@MartinKaburu](https://github.com/MartinKaburu)) [SIG CLI]

- Added a `--prune-allowlist` flag that can be used with `kubectl apply --prune`. This flag now replaces and functions the same as the `--prune-whitelist` flag, which has been deprecated. ([#113116](https://github.com/kubernetes/kubernetes/pull/113116), [@brianpursley](https://github.com/brianpursley))

* Bump addon-manager to v8.7 ([#68299](https://github.com/kubernetes/kubernetes/pull/68299), [@MrHohn](https://github.com/MrHohn))
    * Support extra `--prune-whitelist` resources in kube-addon-manager.
    * Update kubectl to v1.10.7.
* Support extra `--prune-whitelist` resources in kube-addon-manager. ([#67743](https://github.com/kubernetes/kubernetes/pull/67743), [@Random-Liu](https://github.com/Random-Liu))

- Added the --dns-loop-detect option to dnsmasq, which is run by kube-dns. ([#67302](https://github.com/kubernetes/kubernetes/pull/67302), [@dixudx](https://github.com/dixudx))
- Kubernetes now supports extra `--prune-whitelist` resources in kube-addon-manager. ([#67743](https://github.com/kubernetes/kubernetes/pull/67743), [@Random-Liu](https://github.com/Random-Liu))

  `unschedulableAndUnresolvable` status in `PostFilter`. ([#114699](https://github.com/kubernetes/kubernetes/pull/114699), [@kerthcet](https://github.com/kerthcet))

- Added more message for no PodSandbox container. ([#107116](https://github.com/kubernetes/kubernetes/pull/107116), [@yxxhero](https://github.com/yxxhero))
- Added prune flag into `diff` command to simulate `apply --prune`. ([#105164](https://github.com/kubernetes/kubernetes/pull/105164), [@ardaguclu](https://github.com/ardaguclu))

* `kubectl apply --prune` now uses the apps/v1 API to prune workload resources ([#72352](https://github.com/kubernetes/kubernetes/pull/72352), [@liggitt](https://github.com/liggitt))

- `kubeadm`: will now use universal deserializer to decode static pod. ([#120549](https://github.com/kubernetes/kubernetes/pull/120549), [@pacoxu](https://github.com/pacoxu))
- `kubectl prune v2`: Switched annotation from `contains-group-resources` to `contains-group-kinds`,
  because this is what we defined in the KEP and is clearer to end-users. Although the functionality is

- The "kubectl cp" command now supports path shortcuts (../) in remote paths. ([#65189](https://github.com/kubernetes/kubernetes/pull/65189), [@juanvallejo](https://github.com/juanvallejo))
- Fixed dry-run output in kubectl apply --prune ([#69344](https://github.com/kubernetes/kubernetes/pull/69344), [@zegl](https://github.com/zegl))