[iamawacko]

Probably a diaeresis, a diacritic which indicates that two vowels aren't to be read as a digraph or diphthong. It's fancy and pretentious, and frequently seen in New Yorker articles.

[erik_seaberg]

I went through a phase of this because it made sense and I didn’t realize that it wasn’t standard English.

[int_19h]

It is standard English, just somewhat antiquated at this point. Still, you see it quite a bit with "naïve".