nested_layout_bug.d2

Documentation: oss.terrastruct.com/d2/e2etests/testdata/files

     1grid-rows: 1
     2grid-columns: 2
     3a
     4b: {
     5  grid-rows: 1
     6  grid-columns: 1
     7  AA.BB
     8}
     9a -> b.AA