has the remaining bytes of
<tt>C..D</tt>, <em>before</em> encoding.
If <tt>D</tt> is <tt><b>nil</b></tt>, <tt>A</tt> is padded with
the encoding of the remaining bytes of <tt>C</tt>.
Throughout encoding, occurrences of CRLF are replaced by the
<tt>marker</tt>, which itself defaults to CRLF.
</p>

<p class="note">
Note: The simplest use of this function is to encode a string into it's
Quoted-Printable transfer content encoding.
Notice the extra parenthesis around the call to <tt>mime.qp</tt>, to discard the 