And this is why more simply, the quotation mark can imply the period;
similarly, the comma can be inherited by the formulation and implied (there is no sacrifice in '«That's too bad», John said, «but you can recover»' for '«That's too bad, but you can recover»' - the break is in the formulation and the explicit comma is redundant).
similarly, the comma can be inherited by the formulation and implied (there is no sacrifice in '«That's too bad», John said, «but you can recover»' for '«That's too bad, but you can recover»' - the break is in the formulation and the explicit comma is redundant).