PEP8 changes

4 jobs for line_search in 6 minutes and 13 seconds
Status Job ID Name Coverage
  Test
passed #206218
test_min

00:02:48

passed #206219
test_mpi

00:04:36

passed #206220
test_mpi_fftw

00:05:05

passed #206221
test_mpi_fftw_hdf5

00:06:13

65.0%