Nonpareil status

[brouhaha]

I added the 31E and 33E to Nonpareil, and in the process noticed that the self-test was no longer working for any of the Spice models. I tracked that down to fixes to how the external flags work in the Woodstock, Topcat, 19C, and 67, whcih are not relevant to Spice, so I've changed that to restore the old behavior for F1 (s 5) in Spice.

That mostly fixed self-test, but then I noticed that the self-test pass display was not showing the leading minus sign and digit grouping separators (commas in US). And then I noticed that the digit grouping separators weren't working at all. That turned out to be omission of the "i" display segment from the character generator table in the .ncd files for the Spice models. That was an easy fix, but they're still not displayed in the self-test pass result.