[core] a working dev container for azure-cli repo

.devcontainer/devcontainer.json

@@ -0,0 +1,16 @@
+{
+    "image": "python:3.10",
+    "customizations": {
+      "vscode": {
+        "extensions": ["ms-python.python", "eamodio.gitlens"]
+      }
+    },
+    "hostRequirements": {
+      "cpus": 4,
+      "memory": "16gb",
+      "storage": "32gb"
+    },
+    "postCreateCommand": "/workspaces/azure-cli/.devcontainer/init.sh",
+    "postAttachCommand": "/workspaces/azure-cli/.devcontainer/notes.sh",
+    "name": "AzCLI devcontainer"
+  }

.devcontainer/init.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+cd /workspaces
+pip install --upgrade pip
+python3 -m venv azdev
+source ./azdev/bin/activate
+pip3 install azdev
+azdev setup -c /workspaces/azure-cli/

.devcontainer/notes.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+echo "azdev (venv: /workspaces/azdev) and azcli (/workspaces/azure-cli) have been setup and configured."
+echo "Extra manual config steps:"
+echo "  - config vscode python interpreter to '/workspaces/azdev/bin/python'"
+echo "  - run 'source /workspaces/azdev/bin/activate' (if its not loaded by default), so you have azdev/az fully setup."
+echo "  - run 'export VIRTUAL_ENV=/workspaces/azdev/' if you hit this error on azdev: TypeError: expected str, bytes or os.PathLike object, not NoneType"
+echo "==============="
+echo "Debug:"
+echo "  - modify .vscode/launch.json 'args' in 'Azure CLI Debug (Integrated Console)' with your own command in string array (not include az itself) "
+echo "  - seems python extension won't close the debug session, you would have to watch a terminal tab 'Python Debug Console' for debug output."
+echo ""
+echo ""

src/azure-cli/azure/cli/command_modules/acs/tests/latest/test_managed_cluster_decorator.py

@@ -11449,6 +11449,5 @@ def test_update_supportPlan(self):
         normalClusterCalculated = noopDecorator3.update_k8s_support_plan(normalCluster)
         self.assertEqual(normalClusterCalculated, normalCluster)
 
-
 if __name__ == "__main__":
     unittest.main()