Shape inside allows specifying a custom content area for layout
This bug tracks the bugs involved
This needs to be combined with bug 57311
This bug is not blocking bug 57311 anymore, since Exclusions and Shapes have been separated. Updating URL, removing block.
We're focusing on Shapes Level 1 now (shape-outside). I removed the shape-inside code in bug #130698 for now, and I also closed all the open bugs as resolved-later.