message: improved doc, adding double quot for init
diff: @@ -42,7 +42,7 @@ def lagrangian_barycenter(pdiagset, init=None, verbose=False):
  (then initialization is made on ``pdiagset[init]``)
  or a `(n x 2)` ``numpy.array`` enconding
  a persistence diagram with `n` points.
  - :type init: int, (n x 2) np.array
  + :type init: ``int``, or (n x 2) ``np.array``
  :param verbose: if ``True``, returns additional information about the
  barycenter.
  :type verbose: boolean
  