TOC levels have blank spaces and zeros

[ctm]

Fix the TOC structure templates (e.g., wywab_2023_toc) to not use zeros or have antes where there aren't any.

I'm pretty sure this is a matter of level_summary volunteering to do formatting that it's incapable of doing correctly. IndexesByBettingLimitType should be able to do an OK job, I believe, but level_summary claims it, first.

[ctm]

IndexesByBettingLimitType does not do an OK job, but it's better than level_summary, so that's what we'll use for now. My fix is in master. I'll deploy after this evening's game.