I can no longer preview text files (e.g. .txt) in Finder.
All I get is a preview pane showing a black square and TEXT.
Other files such as .tex files show a normal preview of the contents just fine. I think this changed after I installed Sublime Text, although I could be wrong.
I've tried installing qlstephen but this hasn't helped my problem.
Any suggestions much appreciated!
OS X El Capitan (10.11.6) MacBook Pro Retina.
