09d465c397
Avoid use of "_" in SGML IDs. Awhile back that was actually disallowed by the toolchain, as a consequence of which our convention has been to use "-" instead. Fix a couple of stragglers that are particularly inconsistent with that convention and with related IDs. This is just neatnik-ism, so no need for back-patch. Discussion: https://postgr.es/m/769446.1673478332@sss.pgh.pa.us