sequenceDiagram.md += previews under snippets

[gwpl]

📑 Summary

Brief description about the content of your PR.

Resolves #

📏 Design Decisions

Describe the way your implementation works or what design decisions you made if applicable.

📋 Tasks

Make sure you

• 📖 have read the contribution guidelines
• 💻 have added unit/e2e tests (if appropriate)
• 🔖 targeted develop branch

[Yash-Singh1]

mermaid-example already adds the preview and the code: https://github.com/mermaid-js/mermaid/blob/develop/docs/index.html#L102. This will add duplicate previews (the same diagram appears twice).

[gwpl]

I was reading directly from github:
https://github.com/mermaid-js/mermaid/blob/develop/docs/stateDiagram.md
and here is DOES NOT produce preview.

IIUC github/gitlab they are using mermaid code - maybe something has to be fixed in that manner to make marmaid-example work also on those platforms ?

(just created issue ticket: #2895 to track this)

[knsv]

I agree that it would be nice to having it look good at both places!

[Yash-Singh1]

I agree that it would be nice to having it look good at both places!

Yes, but the problem is that it will duplicate the previews in the official docs.

[sidharthv96]

Closed in #3401