demo docs type fix: agressive -> aggressive

Author: nikolas

demos/diff.html

@@ -69,7 +69,7 @@ <H3>Post-diff cleanup:</H3>
 <LABEL FOR="efficiency">Efficiency Cleanup</LABEL>,
 edit cost: <INPUT TYPE="text" SIZE=3 MAXLENGTH=5 VALUE="4" ID="editcost">
 <DD>Increase computational efficiency by factoring out short commonalities which are
-not worth the overhead.  The larger the edit cost, the more agressive the cleanup.</DD>
+not worth the overhead.  The larger the edit cost, the more aggressive the cleanup.</DD>
 <DT><INPUT TYPE="radio" NAME="cleanup" ID="raw">
 <LABEL FOR="raw">No Cleanup</LABEL></DT>
 <DD>Raw output.</DD>