Extra line after each testimonial

I love the simplicity of this plug-in, but the display is off a bit. It’s showing an extra line after every testimonial, like so:

https://www.acreativetype.com/testimonials/

Please advise how to eliminate this broken line – it really distracts (from my POV).

Thank you!
Lisa

https://www.ads-software.com/extend/plugins/genesis-grid-loop/