Currently (IMHO) link detection is (way) oversensitive and results in (attempted) previews, even if they don't make sense or are wanted (1 & 2). In addition, maybe we shouldn't generate preview, where it's not possible (3 & 4)?

beagle-preview-3.png beagle-preview-2.png beagle-preview-1.png beagle-preview-4.png