I sometimes do that including a reference where the addon/mod can be found.
It's still quicker for me to do a compare.
1. Copy edited template.
3. Copy reverted template
5. Paste edited template.
I do hope we get away from mods needing template edits once stable.
That is what drove me away from phpBB2.
Whatever you are used to and what works.
Add: It may be a good idea to log those edits in a separate template so you have it right there.
I am always forgetting where I put things.