Migration for p/blockquote to p/quote problematic

[rockivist]

My test on the Yale EAD set showed two issues with this.

1. When there are multiple paragraphs in the blockquote, all that formatting is lost. Not necessarily a cause of validation issues, but its a notable loss.

2. quote only contains mixed basic, so title and other control access elements valid in paragraph don't validate post-migration.

I'll look a the p/blockquote migration and see if I can tweak it a bit. Kinda surprised we haven't encountered this yet in testing.

[rockivist]

Note to myself: test against mssa.ru.0151.xml

[rockivist]

I poked at this for a bit but didn't come up with a satisfying improvement. I'm going to leave as is in the current version. I'll keep the issue open in case anyone comes looking. We'll see if we hear from people about this. Hopefully it's an edge case.