message: python doc clarifications
diff: @@ -106,8 +106,8 @@ cdef class SimplexTree:
  return self.pcohptr != NULL
  def filtration(self, simplex):
  - """This function returns the simplicial complex filtration value for a
  - given N-simplex.
  + """This function returns the filtration value for a given N-simplex in
  + this simplicial complex, or +infinity if it is not in the complex.
  :param simplex: The N-simplex, represented by a list of vertex.
  :type simplex: list of int.
  @@ -222,14 +222,17 @@ cdef class SimplexTree:
  def insert(self, simplex, filtration=0.0):
  """This function inserts the given N-simplex and its subfaces with the
  - given filtration value (default value is '0.0').
  + given filtration value (default value is '0.0'). If some of those
  + simplices are already present with a higher filtration value, their
  + filtration value is lowered.
  :param simplex: The N-simplex to insert, represented by a list of
  vertex.
  :type simplex: list of int.
  :param filtration: The filtration value of the simplex.
  :type filtration: float.
  - :returns: true if the simplex was found, false otherwise.
  + :returns: true if the simplex was not yet in the complex, false
  + otherwise (whatever its original filtration value).
  :rtype: bool
  """
  cdef vector[int] csimplex
  