I added a command (function?) called STRINGLN. This is just like the STRING function, which types out a string, but after typing out the string, it presses enter. This is not a big change, but to make it, I had to read all the code involved with parsing the script and pressing the buttons. STRINGLN is also a very handy function (command?) as it reduces verbosity and many existing duckyscripts use it. I created a pr to the upstream project which you can see here.
  
Below is an example script from the Hak5 repo that uses STRINGLN.