App crashes trying to view particular diffs (bugfix attached)

To reproduce the issue you have to view a commit that appends code to the end of a file (in my case it was a .js file).

The app crashes trying to render "\ No newline at end of file"
The line object would look like this:
line.oldLine= ""
line.newLine = ""
line.lineContent= "\ No newline at end of file"
line.lineType = null

My fix might not be the best way to fix it but at least the app doesn't crash. Returning null instead of row would also result in a crash.