[RFC] Allow all tests to pass with nocp

This is a follow up on #671. I can now run `make oldtest` with `nocompatible` without any errors.
I see that the Vi default `wildchar` is CTRL-E, and Vim default is `<tab>`. But I do not see `<tab>`, `<c-o>`, nor `<c-e>` anywhere in this test. What does this fix?