ar>blob-2</var> are equal---that is, if they have the same length and equal octets at all valid indices.</p></dd><dt><code>(blob-copy! </code><var>source</var> <var>source-start</var> <var>target</var> <var>target-start</var> <var>n</var><code>)</code></dt><dd><p>Copies data from blob <var>source</var> to blob <var>target</var>.  <var>Source-start</var>, <var>target-start</var>, and <var>n</var> must be non-negative exact integers that satisfy</p><p>0 &lt;= <var>source-start</var> &lt;= <var>source-start</v