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In current version, the cut off seems not so well The final word in excerpt like that This is the final wor...
If you want so: This if the final word ...
From line 91, replace all the $body with:
$Body = substr($Body, 0, 400);
$pos = strrpos($Body, " ");
$Body = substr($Body, 0, $pos);
$Body = strip_tags($Body);
Just my feedback