The iframe here does not have a src. Instead it has a srcdoc, an HTML
pieces fetched from the WW server.
> There are
settings on the iframe and its contents which are not appropriate
for the available width.
I could probably identify some of these things, but could you list the
things that you see to make sure we are on the same page?
I could be mistaken, but:
* math4.css is there because without it, there are some significantly
bad styling issues with the WW content. What is needed could be
migrated to regular PTX css files, but it takes some sitting down
together to make it happen. Ann Arbor, if you, me, and Glenn do not
have more pressing matters?
* bootstrap.css is in there because of Glenn's solutions to some
issues with providing feedback. For just one example, try entering "y"
as the answer to that exercise to trigger a feedback message. IIRC,
Glenn is using bootstrap to deal with positioning issues on these
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