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Which engine does Stack Overflow use to generate edit history? [duplicate]
What is the engine that Stack Overflow uses for the comparison of the two question versions? Below is an example from Math Stack Exchange:
I'd like to use a similar solution for my website, but ...
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What does Stack Overflow use for its community wiki edits comparison feature?
I am referring to this feature:
Note how Stack Overflow shows which bits have been deleted, and which parts have been added (shown in red and green).
Basically, I was wondering if Stack Overflow used ...
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