Twitter confirms it will test an edit button

More than a decade and a half into its existence, Twitter has confirmed what was once unthinkable: an edit button is on the way. The company confirmed as much Tuesday, saying that it's been “been working on an edit feature since last year.” 

The company was light on details, but it did share a mock-up of the feature, which it said it would test first with Twitter Blue subscribers. 

Developing…