code: def quotemeta(text):
      
      text = re.sub(r'/', '//', text)
      text = re.sub(r'\\{', '/{', text)
      text = re.sub(r'\\}', '/}', text)
      return text
docs: Quote letters with special meanings in pychart so that <text> will display
      as-is when passed to canvas.show(). 
  
  >>> font.quotemeta("foo/bar")
  "foo//bar"