# File lib/rcodetools/completion.rb, line 62
  def _handle_brackets(expr_orig, expr)
    [ %w[{ }], %w[( )], %w![ ]! ].each do |left, right|
      n_left  = expr_orig.count(left)  - expr.count(left)
      n_right = expr_orig.count(right) - expr.count(right)
      n = n_left - n_right
      @postfix << ";#{left}" * n if n >= 0
    end
  end