Fix broken named-chunk haddock reference
Fix broken named-chunk haddock reference

And rewrap/wiggle the Haddock markup while at it.

This is a follow-up to
c91dedad7fd35bf7d76fc7dced5aff66310e9d97

bgamari/text,bos/text,bos/text,bos/text,bgamari/text,bos/text,bgamari/text,bgamari/text