"Empty" directives on 1 line?

[paugier]

Context

In MyST, it can make sense to have "1 line fenced code block". It would for example allow sphinx-exercise users to write

```{exercise-end}```

instead of

```{exercise-end}
```

This would save some lines and improve the global readability in documents where there are tens of such directives.

Now, these 2 inputs give very different results (executablebooks/MyST-Parser#617 (comment)), which is kind of surprising for the users.

See executablebooks/MyST-Parser#617

Proposal

I'm wondering if there is a strong reason not to parse

```{exercise-end}```

as a fenced code block?

Tasks and updates

No response

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[hukkin]

Markdown-it-py follows the CommonMark spec, which mandates that

```{exercise-end}```

must be parsed as an inline code span. Parsing it as a fenced code block is a spec violation.

[paugier]

Thanks for your answer!