d a <code>smudge</code>
command, either of which can be left unspecified.  Upon
checkout, when the <code>smudge</code> command is specified, the command is
fed the blob object from its standard input, and its standard
output is used to update the worktree file.  Similarly, the
<code>clean</code> command is used to convert the contents of worktree file
upon checkin.</p>
</div>
<div class="paragraph">
<p>One use of the content filtering is to massage the content into a shape
that is more convenient 