Image alt-text doesn't work when embedded on profiles

Bulletin Board
#1

You can specify alt-text for an image (a tooltip-esque accessibility feature) by changing the set of characters prior to the first | and after the first [ in the embedding code:

![TheFileNameOfTheImage|690x276](upload://vlHPPR6wfxVAXIQFUXDLoTSYsdV.jpeg)

4k-dog-wallpaper
4k-dog-wallpaper1920×1080 166 KB

→

![A picture of a labrador-sized dog in an Autumn forest of leaves, serene.|690x276](upload://vlHPPR6wfxVAXIQFUXDLoTSYsdV.jpeg)

A picture of a labrador-sized dog in an Autumn forest of leaves, serene.
A picture of a labrador-sized dog in an Autumn forest of leaves, serene.1920×1080 166 KB

Comparison: