class SyntaxTree::IfOp

def format_break(q)
  Parentheses.break(q) do
    q.text("if ")
    q.nest("if ".length) { q.format(predicate) }
    q.indent do
      q.breakable_space
      q.format(truthy)
    end
    q.breakable_space
    q.text("else")
    q.indent do
      q.breakable_space
      q.format(falsy)
    end
    q.breakable_space
    q.text("end")
  end
end