Only go back in history one time
Only go back in history one time

I don't know how to prove this, but I think that going back one step
too many causes Capybara to fail to clear the local / session
storage. This causes state to leak from one test to another, leading
to failures.

Debugging shows that we are still at the 127.0.0.1 host, and using the
same seed (`--seed 53510`) locally doesn't produce the failure. This
issue could be environmental, OS, browser version, etc.

integer32llc/rust-playground,integer32llc/rust-playground,integer32llc/rust-playground,integer32llc/rust-playground,integer32llc/rust-playground