Since we migrated from the Haskell runtime (what's in master now) to a React + Typescript runtime that's part of the frontend (what's in web-runtime now), a lot of the example domains we implemented for the paper need to be ported to the new runtime.

This is high-priority for us since it will enable us to test that the new runtime is at parity, and start c

I'd like to be able to run commands on all lines of a file. For example, bsed wrap lines with " should execute on all lines of the file. Current workaround is to include some trivial filter like wrap lines containing '.' with "

The test suite is currently somewhat weak with respect to testing error cases and validating the resulting error messages.

The test suite should probably move tests that check error cases into a separate directory.