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### Sets use most of the same formatting code as lists, so we don't test
### all of the edge cases here, just the basics.
>>> Line comment in empty set.
var set = {
// comment
};
<<<
var set = {
  // comment
};
>>> Inline block comment.
var set = {  /* comment */  };
<<<
var set = {/* comment */};
>>> After element.
({element // comment
});
<<<
({
  element, // comment
});