thank you for your answer.
When I checked here, I couldn't confirm the blank line.
However, when I create the following consecutive tables, a blank row is created between them.
<table border="0" cellpadding="0" cellspacing="0" style="width:98%;">
<tbody><tr><th>THHHHH</th><td>TRRRR</td></tr></tbody></table>
<table border="0" cellpadding="0" cellspacing="0" style="width:98%;">
<tbody><tr><th>THHHHH</th><td>TRRRR</td></tr></tbody></table>
<table border="0" cellpadding="0" cellspacing="0" style="width:98%;">
<tbody><tr><th>THHHHH</th><td>TRRRR</td></tr></tbody></table>
<div>DIV<p>P</p>DIV</div>