Quoted blocks in bill text not highlighted properly

[GPHemsley]

In the text of a bill such as S. 3989, only the first section of a quoted block is highlighted when all such sections should be.

I believe this is resulting from code introduced in the following commit:
govtrack/congressxml@462aef9

I haven't tracked down exactly why or what the fix is, but I think it ultimately comes down to the fact that wrap_children is not being set to True when it should be, resulting in each section getting its own wrapper, thus preventing the expected CSS rule from applying.