message: Code review:
  Use "func" in python doc
diff: @@ -223,7 +223,7 @@ cdef class CubicalComplex:
  Since the cubical complex construction from vertices is different from the top dimensional one,
  the former may not have an equivalent with the second construction, and vice versa.
  - Therefore, using cofaces_of_persistence_pairs with a cubical complex constructed from vertices
  + Therefore, using :func:`cofaces_of_persistence_pairs` with a cubical complex constructed from vertices
  can lead to an undefined behavior.
  This function returns a list of pairs of top-dimensional cells corresponding to
  @@ -280,8 +280,8 @@ cdef class CubicalComplex:
  Since the cubical complex construction from vertices is different from the top dimensional one,
  the former may not have an equivalent with the second construction, and vice versa.
  - Therefore, using vertices_of_persistence_pairs with a cubical complex constructed from top_dimensional_cells
  - can lead to an undefined behavior.
  + Therefore, using :func:`vertices_of_persistence_pairs` with a cubical complex constructed from
  + top_dimensional_cells can lead to an undefined behavior.
  :returns: The vertices of the positive and negative cells,
  together with the corresponding homological dimension, in two lists of numpy arrays of integers.
  