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Notepad++ has 'Reload from disk' right after New and Open, and I like that explicit wording. 'Revert' is a bit esoteric for beginners. (And I do not see that on the menu now.)
Kurt's argument applies to Notepad++ also -- one could close the file and reload from the recent files list, but there it is. There is a subtle psychological factor: reloading may mean 'I messed up and want to start over'. In that state, a simple direct reload is tension defuser.
Quite separately, Notepad++ check file modification times when it gets the focus and if the disk copy is newer, it pops up a box saying so and asking if one wants to reload. (Or perhaps it check for OS notifications at this time.) This is the feature directed at catching reverts and merges.