t>" line-wrap filter works just like the default
"<tt>text</tt>" line-wrap filter with default length.
The function can also wrap "<tt>quoted-printable</tt>" lines, taking care
not to break lines in the middle of an escaped character. In that case, the
line length is fixed at 76.
</p>

<p class="note">
For example, to create an encoding filter for the Quoted-Printable transfer content encoding of text data, do the following:
</p>

<pre class="example">
qp = ltn12.filter.chain(
  mime.normalize(),
  mime.enc