mail-quote-printable
mail-quote-printable is an autoloaded compiled Lisp function in `mail-utils.el
'.
(mail-quote-printable STRING &optional WRAPPER)
Convert a string to the "quoted printable" Q encoding if necessary.
If the string contains only ASCII characters and no troublesome ones,
we return it unconverted.
If the optional argument WRAPPER is non-nil,
we add the wrapper characters =?ISO-8859-1?Q?....?=.