Vertical dotted line under last article-image

Hello,
I’m using the enfold-theme. I have created a Site (http://www.tierheim-horka.de/artikel-2003-hunde-katzen-waschbaeren-aktionen/) , where I display blog-post from a category. I use the blog-style: Single author, small preview pic and the blog content length:Excerpt with read more link. Is it correct, that after the last article image you can see the
dotted line? I use als the icon-list (http://www.tierheim-horka.de/tierheim-horka-sponsoren-unterstuetzer-tierpaten/), there I haven’t this problem. Maybe you can help me.