I had a macro that didn't work until I re-typed it from scratch leading me to discover the issue that different macros can look identical

    <\assign|sj-info-list>
      <\macro|items>
        <\itemize-sj-info-i>
          <map-args|sj-item|document|items>
        </itemize-sj-info-i>
      </macro>
    </assign>

    <assign|sj-info-list-good|<\macro|items>

      <\itemize-sj-info-i>
        <map-args|sj-item|document|items>
      </itemize-sj-info-i>
    </macro>>

They look different, but in the editor they look the same.

Only the -good one works.

The other one renders as:

What's broken here, and why is it not possible to see the error in the source view of the editor?

Sam