message: doc review: add a warning about phantom simplices for blocker_func
diff: @@ -487,6 +487,11 @@ cdef class SimplexTree:
  with this new simplex (represented as a list of int). If `blocker_func` returns `True`, the simplex is removed,
  otherwise it is kept. The algorithm then proceeds with the next candidate.
  + .. warning::
  + Several candidates of the same dimension may be inserted simultaneously before calling `block_simplex`, so
  + if you examine the complex in `block_simplex`, you may hit a few simplices of the same dimension that have
  + not been vetted by `block_simplex` yet, or have already been rejected but not yet removed.
  +
  :param max_dim: Expansion maximal dimension value.
  :type max_dim: int
  :param blocker_func: Blocker oracle.
  