I forgot what I changed here and now I'm not sure if I want to save the changes or not. The only way to figure out what I changed is to take screenshots then refresh the page to forget unsaved changes and compare with the pictures taken.
surprisingly, nobody has pointed out a button I've staired at for days and never noticed this week... 
hopefully somebody else has come across this problem and found an easier way
Would like to see an easier solution. I usually copy it, do not save, and then reload to compare.
+1 for sure
that duplicate button!!! 
i did know about it, but I think I've only used it once or twice.
I'm gonna count it, it's close enough 
true true, nitpicking that it would be cool that we could have similar feature to what release history has side by side.
+1 to this - agree that there are plenty of workarounds (I personally like notepad++ ) but a (popup?) compare would be awesome.
Requested! I'll follow up if I get any updates internally