Visual Cue When Move on to Next Test

[brodieG]

It is a bit disorienting when a test is accepted/rejected and the next test comes along with a lot of screen output. We need some visual cue to let us quickly track down where the new test starts. Some ideas:

• Changing color unitizer> prompt, worked great, except that readline got all confused
• Slow down scroll of new output? Could be annoying to people, and still not really resolve the issue
• a "light" delimiter, e.g. . . . . . . . ... or some such drawn right after test is accepted / rejected?

[brodieG]

Another thought here was to have a right aligned post-prompt that tells you what happened:

unitizer> Y
                                                               [Y: test added to store]
> next_test()
[1] TRUE

unitizer>