https://github.com/mdn/browser-compat-data/pull/23791 was a case where there was an IE version, but Edge was set to mirror, resulting in Edge 79. This is probably correct in some case, but there are probably more errors of this sort.
comm -23 <(npm run traverse -- -b edge -f mirror | sort) <(npm run traverse -- -b ie -f false -f null | sort) produces this list for review:
https://github.com/mdn/browser-compat-data/pull/23791 was a case where there was an IE version, but Edge was set to mirror, resulting in Edge 79. This is probably correct in some case, but there are probably more errors of this sort.
comm -23 <(npm run traverse -- -b edge -f mirror | sort) <(npm run traverse -- -b ie -f false -f null | sort)
produces this list for review: