# File lib/asciidoctor/substitutors.rb, line 1202
  def normalize_string str, unescape_brackets = false
    unless str.empty?
      str = str.strip.tr LF, ' '
      str = str.gsub ESC_R_SB, R_SB if unescape_brackets && (str.include? R_SB)
    end
    str
  end