[shadow-styling] Swap around /shadow/ and /shadow-all/.

--HG--
extra : rebase_source : 900f5a69304013309c1ae5878965b844039ac2b9
[css-grid] Consistent formatting across the spec, woo\!

--HG--
extra : rebase_source : 2bd76cf36cd5c4de9c41b94fdff18a230459d14b