A</tt> is the stuffed version of <tt>B</tt>. '<tt>n</tt>' gives the
number of characters from the sequence CRLF seen in the end of <tt>B</tt>.
'<tt>m</tt>' should tell the same, but for the previous chunk.
</p>

<p class="note">Note: The message body is defined to begin with
an implicit CRLF. Therefore, to stuff a message correctly, the
first <tt>m</tt> should have the value 2.
</p>

<pre class="example">
print((string.gsub(mime.dot(2, ".\r\nStuffing the message.\r\n.\r\n."), "\r\n", "\\n")))
--&gt; ..\nStu