comment handling is odd

I was testing the fix for bug 1686640 where merges without a comment are changed to be printed a different color. While this works it revealed a bug in comment processing - on the test page, https://merges.ubuntu.com/main-new.html, we can see that cdrom-detect is colored as if there is a comment although there is no text there.

Here's the source:

<tr bgcolor=#ff8080 class=first>
<td><tt><a href="c/cdrom-detect/REPORT">cdrom-detect</a></tt>
 ^{<a href="https://launchpad.net/ubuntu/+source/cdrom-detect">LP</a>}
 ^{<a href="http://tracker.debian.org/cdrom-detect">PTS</a>}
[foundations-bugs]</td>
<td colspan=3><a href='https://launchpad.net/~adconrad'>Adam Conrad &lt;<email address hidden>&gt;</a></td>
<td rowspan=2><form method="get" action="addcomment.py"><br />
<input type="hidden" name="component" value="main" />
<input type="hidden" name="package" value="cdrom-detect" />
<input type="text" style="border-style: none; background-color: #ff8080" name="comment" value="" title="" />
</form></td>
<td rowspan=2>
&nbsp;
</td>
<td rowspan=2>
587
</td>
</tr>
<tr bgcolor=#ff8080>
<td><small>cdrom-detect</small></td>
<td>1.57ubuntu4</td>
<td>1.67</td>
<td>1.57</td>
</tr>

Looking at comments.txt on the server we can see:

cdrom-detect: #861300
cdrom-detect: Debian bug #861300
cdrom-detect:

I'm guessing only the last comment is used and there is no checking for empty data.