the exercises are not embedded correctly
I've tried running the run function in ghci, but it looks like the examples are not being embedded correctly for some reason.
For instance, if I go to http://localhost:8080/#/events/transforming, I see the following page:

You can see that it looks like the HTML for the example is directly in the page, and it does not look like it is being interpreted as HTML.
It appears that this problem doesn't occur in commit ce23f101f7.
I haven't run a git-bisect to figure out which commit causes this, but I could if it is not reproducible for some reason. The commit above is just a random commit around the time that I remember it working (from Lambda Jam).
This should be fixed now - sorry about the delay.