fix paren formatting

[fables-tales]

No description provided.

[reese]

As far as the approach here, I think probably what you want is basically reverting the changes in 764836d and then changing this bit to have more restrictions -- i.e. return None if there's multiple statements or it's one of whatever list of node types (UnlessNode, IfNode, UntilNode, etc.). (I worry that there will be ~a lot of node types that you'll have to exempt -- and you'll probably want to add a bunch of tests for return/yield/every other keyword where we sometimes don't render them with parens -- hence my general FUD with stripping parens, but c'est la vie.)

(Gonna unassign myself while you're working on this, but feel to reassign when things are working!)