message: Update src/python/gudhi/wasserstein.py
  typo correction
diff: @@ -18,7 +18,7 @@ except ImportError:
  def _proj_on_diag(X):
  '''
  :param X: (n x 2) array encoding the points of a persistent diagram.
  - :returns: (n x 2) arary encoding the (respective orthogonal) projections of the points onto the diagonal
  + :returns: (n x 2) array encoding the (respective orthogonal) projections of the points onto the diagonal
  '''
  Z = (X[:,0] + X[:,1]) / 2.
  return np.array([Z , Z]).T
  