Css class: .dynamik-content-filler-img

#1
Why is this css class being generated: .dynamik-content-filler-img and why does it have "Height: 1px !important" ?

Its adding a 1px line at the end of the body before the footer of my website. Any one have an idea what it is for?
 
#2
Click the question mark next to the content filler image option at the bottom of the Content option page and it explains it to you. It's always a good idea to check out what explanation has been written for each option if there is a question mark next to it. Hope that helps.