Moral: take articles you read, even on unimportant topics, with a grain of salt.
I too remember the articles a few weeks back about Dunkin Donuts (and Mister Donut) being the ones that invented the word Donut.
This 1946 video obviously puts the lie to that.
I grew up in the Boston area during the time Mister Donut and Dunkin Donuts were big chains. Nobody ever mentioned back then that they were responsible for the "donut" spelling. I never remember spelling donut as "doughnut" either.
The media is so lazy that you can't even take unimportant things they say for granted anymore. Journalism is for the most part dead.