removed power_indices documentation and other minor changes

4 jobs for sphinx_docs in 5 minutes and 19 seconds
Status Job ID Name Coverage
  Test
passed #170284
test_min

00:02:41

passed #170285
test_mpi

00:03:27

passed #170286
test_mpi_fftw

00:04:06

passed #170287
test_mpi_fftw_hdf5

00:05:18

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