# File lib/mail/version_specific/ruby_1_8.rb, line 24
    def Ruby18.escape_bracket( str )
      re = /\\\>/
      str = str.gsub(re) { |s| '>'}
      re = /\\\</
      str = str.gsub(re) { |s| '<'}
      re = /([\<\>])/          # Only match unescaped parens
      str.gsub(re) { |s| '\\' + s }
    end