az role definition create --role-definition example fails

> ### `az feedback` auto-generates most of the information requested below, as of CLI version 2.0.62

**Describe the bug**

When trying to create a new custom role definition using Cloud Shell Azure CLI, my script keeps failing.
I have tried to use the the example from the **az role definition create --role-definition** section in the Docs page, but also get an error here. All other examples I have located, utilize an external JSON file, and I like to use the script with embedded JSON code, for easier management and documentation.

Reference:
**az role definition**
[https://docs.microsoft.com/en-us/cli/azure/role/definition?view=azure-cli-latest#az_role_definition_create](url)

**Example code** (subscription id replaced with id from my tenant):

```
az role definition create --role-definition '{
"Name": "Contoso On-call",
"Description": "Perform VM actions and read storage and network information.",
"Actions": [
"Microsoft.Compute/*/read",
"Microsoft.Compute/virtualMachines/start/action",
"Microsoft.Compute/virtualMachines/restart/action",
"Microsoft.Network/*/read",
"Microsoft.Storage/*/read",
"Microsoft.Authorization/*/read",
"Microsoft.Resources/subscriptions/resourceGroups/read",
"Microsoft.Resources/subscriptions/resourceGroups/resources/read",
"Microsoft.Insights/alertRules/*",
"Microsoft.Support/*"
],
"DataActions": [
"Microsoft.Storage/storageAccounts/blobServices/containers/blobs/*"
],
"NotDataActions": [
"Microsoft.Storage/storageAccounts/blobServices/containers/blobs/write"
],
"AssignableScopes": ["/subscriptions/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"]
}'
```

The script produces this **error**:

```
ArgumentParseError: unrecognized arguments: On-call,
Description: Perform VM actions and read storage and network information.,
Actions: [
Microsoft.Compute/*/read,
Microsoft.Compute/virtualMachines/start/action,
Microsoft.Compute/virtualMachines/restart/action,
Microsoft.Network/*/read,
Microsoft.Storage/*/read,
Microsoft.Authorization/*/read,
Microsoft.Resources/subscriptions/resourceGroups/read,
Microsoft.Resources/subscriptions/resourceGroups/resources/read,
Microsoft.Insights/alertRules/*,
Microsoft.Support/*
],
DataActions: [
Microsoft.Storage/storageAccounts/blobServices/containers/blobs
...

```

The example in the documentation is expected to be usable in any subscription, just with a custom subscription ID added.
Used environment is the Cloud Shell Azure CLI in PowerShell mode.