# File lib/core/facets/string/ascii_only.rb, line 17
  def ascii_only(alt='')
    encoding_options = {
      :invalid                     => :replace,  # Replace invalid byte sequences
      :undef                       => :replace,  # Replace anything not defined in ASCII
      :replace                     => alt,       # Use a blank for those replacements
      :UNIVERSAL_NEWLINE_DECORATOR => true       # Always break lines with \n
    }
    self.encode(Encoding.find('ASCII'), encoding_options)
  end