class Roda::RodaPlugins::ErubisEscaping::UnsafeClassEscaper

given object is not already a string, convert it to a string first.
classes, escape it, otherwise return it verbatim. If the
If the string given is not an instance of one of the safe

def escape_xml(string)
  unless string.is_a?(String)
    string = string.to_s
  end
  if @safe_classes.any?{|c| string.is_a?(c)}
    string
  else
    Escaper.escape_xml(string)
  end
end