problems with downloading Winehq on Ubuntu 16.04

I was following the instructions on the https://wiki.winehq.org/Ubuntu for winehq installation. When I executed

sudo apt-add-repository 'deb https://dl.winehq.org/wine-builds/ubuntu/ xenial main' 

a blank line appeared with no response and it brought me back to the input line. I thought maybe it worked and then I executed sudo apt update and it said

Malformed entry 6 in list file /etc/apt/sources.list (component).  

Can anyone help? deb-src https://archive.Ubuntu.com/Ubuntu xenial-security main restricted universe multiverse Also if I may add I am running a chroot