[baktubi]

Hmm. This feels a bit wrong to me. Double period makes longer pause, and wedged between a quote it doesn’t flow well:

.”. Feels like a visual stutter.

Either .” or “. are more final and visually stable.

I’d argue depending on whether the pause affected by the period is important to the quote itself, put it in the quote. Then again, a block-quotation is probably more suitable for that scenario. Personally, for basic quotes in prose I’d put the period on the outside of quote because that directs readers to pause after the quote ends, not before.

[xdennis]

If it's like coding styles, almost anything to do with style is a matter of how much you're used to it. If .”. was the norm you might not find it so stylistically wrong.

But .” is always syntactically wrong when then quoted text didn't have a full stop in it, and ”. is ambiguous about whether it's a complete sentence or not.