efers to the true
content stored outside Git, or an encrypted content) and turn it into a
usable form upon checkout (e.g. download the external content, or decrypt
the encrypted content).</p>
</div>
<div class="paragraph">
<p>These two filters behave differently, and by default, a filter is taken as
the former, massaging the contents into more convenient shape.  A missing
filter driver definition in the config, or a filter driver that exits with
a non-zero status, is not an error but makes the filt