The 3.2a doc is unchanged (similarly lacking).

The situation is that view have all of the special method (operator methods) that frozen sets do but none of the named methods (.copy to .union). I think it would be helpful if the doc said so. Perhaps change

"Then these set operations are available ..."

to

"For set-like view, all of the syntax operations on sets (but none of the named methods, like set.copy,) are available ..."

I think

dictview < / <= / >= / > other:
 same as corresponding operation with two sets

might be sufficient, but list all four is ok too.