1. Clearer about scatter_forward in interpolate - Should add a note (if it is not there already 2. Isoparametric element - Add a note explaining the differences, and that we can do all 3. Clearer on difference between `ufl.Coefficient` and `dolfinx.fem.Function`. - Should be clearer with `compile_form` in 0.9
ufl.Coefficientanddolfinx.fem.Function.compile_formin 0.9