In 3b09ff6af7, we stopped adding a clear
screen after curser after each log line. This inadvertently caused
supershell lines to get interlaced with log lines. This can be fixed by
writing a ClearScreenAfterCursor after every newline character that we
write to stdout.
As a bonus, I had also long noticed that supershell log lines would get
interlaced with the serverTestProj/test output and this change fixes
that as well.