Using standard syntax

[mcondarelli]

Is there any reason preventing usage of (de facto) standard syntax for PlantUML inclusion using fencing?

I mean: Why use

{% plantuml %}
@startuml
...
@enduml
{% endplantuml %}

instead of:

```puml
@startuml
...
@enduml
```

Could this be considered in future updates?

[yegor256]

@mcondarelli I believe, both options would work just fine. I just added a test for it: 7366d3b