Modernize naïf -> naive

[robinwhittleton]

Also add a warning that naïf as a noun is the correct usage.

I’ve covered the rest of the corpus: the two remaining naïfs are part of French text.

[acabal]

In M-W, it's listed as naïf with the umlauts. So what we should do is normalize naif(s?) to naïf\1 in a separate regex instead of using the same one.

[robinwhittleton]

All the naïf / naifs I’ve found in the corpus so far have been the adjective, which we said we’d modernize to naive. The warning is just so that people check that it’s not a noun.

Or am I misunderstanding?

[acabal]

Yes, but if naïf is a noun, and it occurs as naif, then we want to add the umalut in modernize-spelling.