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Fix rendering of is_defined example. (#21575)

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Danny Tsang 2022-02-18 22:54:30 +00:00 committed by GitHub
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source/_docs/configuration/templating.markdown
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@ -515,10 +515,14 @@ The `is_defined` filter allows to throw an error if a value or object is not def
Example using `is_defined` to parse a JSON payload:
{% raw %}
```text
{{ value_json.val | is_defined }}
```
{% endraw %}
This will throw an error `UndefinedError: 'value_json' is undefined` if the JSON payload has no `val` attribute.