Potential bug fixed.

The last 3 tr elements of the table which contains the submissions is not news submitted by users, so we should remove them from the rows list.

These are the last three tr elements in current hacker news html source code:

&lt;tr style="height:5px"&gt;&lt;/tr&gt;
&lt;tr style="height:10px"&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan="2"&gt;&lt;/td&gt;&lt;td class="title"&gt;&lt;a href="newest?next=8442017&amp;n=31" rel="nofollow"&gt;More&lt;/a&gt;&lt;/td&gt;&lt;/tr&gt;