added memo to PowerEnergy and changed check in smoothness and laplace from len(domain) != 0 to 1

4 jobs for working_on_demos in 6 minutes and 44 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #201387
test_min

00:03:21

passed #201388
test_mpi

00:04:35

passed #201389
test_mpi_fftw

00:05:28

passed #201390
test_mpi_fftw_hdf5

00:06:44

67.0%