Use SpatialConstant naming in get_pde_as_diff_op - #309

Use SpatialConstant naming in get_pde_as_diff_op#309

inducer merged 3 commits into

inducer:maininducer/sumpy:mainfrom

alexfikl:fix-get-pde-as-diff-opalexfikl/sumpy:fix-get-pde-as-diff-opCopy head branch name to clipboard