javascript - Problems using sublime to compare files?

I downloaded a plug-in called Diffy using sublime. Why does it look like this when I use it?
Is there any good way to compare files in sublime?

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I downloaded a plug-in called Diffy using sublime. Why does it look like this when I use it?
Is there any good way to compare files in sublime?

SublimeFileDiffs
https://github.com/colinta/SublimeFileDiffs