message: Missing empty lines in sphinx doc
diff: @@ -11,6 +11,7 @@ Example of gradient computed from Vietoris-Rips persistence
  -----------------------------------------------------------
  .. testsetup::
  +
  import numpy
  numpy.set_printoptions(precision=4)
  @@ -30,6 +31,7 @@ Example of gradient computed from Vietoris-Rips persistence
  print(grads[0].numpy())
  .. testcleanup::
  +
  numpy.set_printoptions(precision=8)
  .. testoutput::
  