Since the following change has been applied, some previously working Mermaid diagrams report "syntax error":

• Auto activation of mermaid diagrams (via use of hugo render hook) #990

But nothing has changed in the diagrams and the live Mermaid editor are fine with the Mermaid code.

I believe that the problem stems from the decision to render the code block as a <div> rather than <pre>:

Ok, after some digging, I've found that <pre> is _required, see Requirements for the Mermaid API:

References:

• https://github.com/google/docsy/pull/990/files#r997232082
• Screenshot when rendering fails for page https://opentelemetry.io/docs/demo/architecture/:

  

/cc @stephanlachnit @deining