How to get infinite caps in Fallout 4 - before the inevitable patch fixes it, that is

If you find yourself running low on bottlecaps during your travels through the post-nuclear war wasteland of Boston, good news: Fallout 4 players have discovered an infinite caps exploit, and it's easy to do. Simply go to a vendor and buy all of one type of ammo. Sell one - and only one - ammo back to them, but do not finalize the sale. Sell the ammo again, in any amount that does not result in you