# File lib/brakeman/processors/haml_template_processor.rb, line 106
  def process_block exp
    exp = exp.dup
    exp.shift
    if @inside_concat
      @inside_concat = false
      exp[0..-2].each do |e|
        process e
      end
      @inside_concat = true
      process exp[-1]
    else
      exp.map! do |e|
        res = process e
        if res.empty?
          nil
        else
          res
        end
      end
      Sexp.new(:rlist).concat(exp).compact
    end
  end