From documentation, it is not clear to me what is the format supported for pandoc.RawBlock and raw_attributes

For raw_attributes, doc says https://pandoc.org/MANUAL.html#extension-raw_attribute

The format name should match the target format name (see -t/—to, above, for a list, or use pandoc —list-output-formats)

and pandoc.RawBlock only says format of content.

I would think that pandoc.RawBlock(FORMAT, text) would work, but FORMAT is

The global FORMAT is set to the format of the pandoc writer being used (html5, latex, etc.), so the behavior of a filter can be made conditional on the eventual output format.

but it seems this don’t work in some case like reveajs

```{=revealjs} content ```

does not get included in output, only using html works. Same with pandoc.RawBlock

Is this expected ? Or is this an issue to report ?

Thank you