/usr/share/ktelepathy/styles/SimKete.AdiumMessageStyle/Contents/Resources/Incoming/NextContent.html is in kde-telepathy-text-ui 4:15.12.3-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | <li class="NextIncomingMessage" >%message%</li>
<!-- For support of consecutive messages -->
<div id="insert" />
|