There's also been other Markdown renderers that support this exact syntax for Mermaid blocks for ages. I have a site that's generated using mkdocs that uses Mer

There's also been other Markdown renderers that support this exact syntax for Mermaid blocks for ages. I have a site that's generated using mkdocs that uses Mermaid diagrams, and I was able to open up one of the files from that site in Github and view the diagrams.