Forgive me for criticizing, but I don't think that highlights the change that occurs. Now the docs will have two contradictory statements: one statement will say there are implicit breaks, and this new statement will say there are implicit nexts. I think some readers may get confused and believe that one of them is a typo. I think, something like the following would highlight that a change occurs from implict breaks to implicit nexts:

Inside a for-loop, a when block ends with an implicit next rather than an implicit break.