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tedsmith:
From your post, I assume the problem lies in the headlines shown in the Recent News block. The code that includes the three dots is indeed the one you've pointed out. However, the piece of code also shows something else: you can configure the length of the news title. Basically, the lines
if (strlen($title) >= $options[2]) {
$title = $myts->makeTboxData4Show (xoops_substr($title,0,($options[2]-1)))."...";
say something like: "If the length of the news item title is equal to or larger than the value of option 2, then replace it with a substring of length option 2 less 1".
So instead of editing the PHP code (which is something risky unless you're sure of what you're doing), simply go to the block definition page. In Admin > Blocks look for the Recent News block and click on the "Edit" link placed at the far right. This will take you to a page where you can change the value of option 2. Set it to a higher value than the default to lose the three dots.
Cheers.