
starting from <i>start</i>, are about to be compressed. This generic
function should not be called directly, but may be specialized.

<p>This is useful for data formats that must maintain information about
the uncompressed contents of a compressed data stream, such as
checksums or total data length.
</blockquote>


<p><a name='finish-data-format'>[Generic function]</a><br>
<b>finish-data-format</b> <i>compressor</i> => |

<blockquote>
Called
by <a href='#finish-compression'><tt>FINISH-COMPRESSION</tt></a>.