docs: update xargs command and add #END to debug.yaml example (#10565)

* docs: Add #END to the `debug.yaml` basic snippet (#10549)

* Update load-balancing.md

modify load-balancing effect command line

* Update rate-limiting.md

* Update rate-limiting.md in zh

* Update load-balancing.md in zh

---------

Co-authored-by: Nicolas Fränkel <[email protected]>

Author: YINWEIHSU

docs/en/latest/debug-mode.md

@@ -36,6 +36,7 @@ You can enable the basic debug mode by adding this line to your debug configurat
 ```yaml title="conf/debug.yaml"
 basic:
   enable: true
+#END
 ```
 
 APISIX loads the configurations of `debug.yaml` on startup and then checks if the file is modified on an interval of 1 second. If the file is changed, APISIX automatically applies the configuration changes.

docs/en/latest/getting-started/load-balancing.md

@@ -85,7 +85,7 @@ From `mock.api7.ai`:
 Let's generate 100 requests to test the load-balancing effect:
 
 ```shell
-hc=$(seq 100 | xargs -i curl "http://127.0.0.1:9080/headers" -sL | grep "httpbin" | wc -l); echo httpbin.org: $hc, mock.api7.ai: $((100 - $hc))
+hc=$(seq 100 | xargs -I {} curl "http://127.0.0.1:9080/headers" -sL | grep "httpbin" | wc -l); echo httpbin.org: $hc, mock.api7.ai: $((100 - $hc))
 ```
 
 The result shows the requests were distributed over the two services almost equally:

docs/en/latest/getting-started/rate-limiting.md

@@ -50,7 +50,7 @@ You will receive an `HTTP/1.1 201 OK` response if the plugin was added successfu
 Let's generate 100 simultaneous requests to see the rate limiting plugin in effect.
 
 ```shell
-count=$(seq 100 | xargs -i curl "http://127.0.0.1:9080/ip" -I -sL | grep "503" | wc -l); echo \"200\": $((100 - $count)), \"503\": $count
+count=$(seq 100 | xargs -I {} curl "http://127.0.0.1:9080/ip" -I -sL | grep "503" | wc -l); echo \"200\": $((100 - $count)), \"503\": $count
 ```
 
 The results are as expected: out of the 100 requests, 2 requests were sent successfully (status code `200`) while the others were rejected (status code `503`).

docs/zh/latest/debug-mode.md

@@ -28,6 +28,7 @@ title: Debug Mode
 ```
 basic:
   enable: true
+#END
 ```
 
 注意：在 APISIX 2.10 之前，开启基本调试模式曾经是设置 `conf/config.yaml` 中的 `apisix.enable_debug` 为 `true`。

docs/zh/latest/getting-started/load-balancing.md

@@ -85,7 +85,7 @@ curl -i "http://127.0.0.1:9180/apisix/admin/routes" -X PUT -d '
 我们生成 100 个请求来测试负载均衡的效果：
 
 ```shell
-hc=$(seq 100 | xargs -i curl "http://127.0.0.1:9080/headers" -sL | grep "httpbin" | wc -l); echo httpbin.org: $hc, mock.api7.ai: $((100 - $hc))
+hc=$(seq 100 | xargs -I {} curl "http://127.0.0.1:9080/headers" -sL | grep "httpbin" | wc -l); echo httpbin.org: $hc, mock.api7.ai: $((100 - $hc))
 ```
 
 结果显示，请求几乎平均分配给这两个上游服务：

docs/zh/latest/getting-started/rate-limiting.md

@@ -50,7 +50,7 @@ curl -i "http://127.0.0.1:9180/apisix/admin/routes/getting-started-ip" -X PATCH
 我们同时生成 100 个请求来测试限速插件的效果。
 
 ```shell
-count=$(seq 100 | xargs -i curl "http://127.0.0.1:9080/ip" -I -sL | grep "503" | wc -l); echo \"200\": $((100 - $count)), \"503\": $count
+count=$(seq 100 | xargs -I {} curl "http://127.0.0.1:9080/ip" -I -sL | grep "503" | wc -l); echo \"200\": $((100 - $count)), \"503\": $count
 ```
 
 请求结果同预期一致：在这 100 个请求中，有 2 个请求发送成功（状态码为 `200`），其他请求均被拒绝（状态码为 `503`）。