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Fix missing code block in playbook variables doc
A code sample was not being rendered as a code block. This adds the preceding '::' reStructuredText markup.
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@ -173,7 +173,7 @@ The variable value will be used as is, but the template evaluation will raise an
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Defaulting Undefined Variables
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Defaulting Undefined Variables
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Jinja2 provides a useful 'default' filter, that is often a better approach to failing if a variable is not defined.
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Jinja2 provides a useful 'default' filter, that is often a better approach to failing if a variable is not defined::
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{{ some_variable | default(5) }}
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{{ some_variable | default(5) }}
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