class Magick::RVG::Utility::TextStrategy

def enquote(text)
  if text.length > 2 && /\A(?:\"[^\"]+\"|\'[^\']+\'|\{[^\}]+\})\z/.match(text)
    return text
  elsif !text['\'']
    text = '\''+text+'\''
    return text
  elsif !text['"']
    text = '"'+text+'"'
    return text
  elsif !(text['{'] || text['}'])
    text = '{'+text+'}'
    return text
  end
  # escape existing braces, surround with braces
  text.gsub!(/[}]/) { |b| '\\' + b }
  '{' +  text + '}'
end