Fix typos

#. The domain is initially defined by a single grid of size :cpp:`n_cell`.

#. If :cpp:`n_cell` is greater than :cpp::`max_grid_size` then the grids are subdivided until

each grid is no longer than  :cpp::`max_grid_size` cells on each side.  The :cpp:`blocking_factor` criterion

#. If :cpp:`n_cell` is greater than :cpp:`max_grid_size` then the grids are subdivided until

   each grid is no longer than  :cpp:`max_grid_size` cells on each side.  The :cpp:`blocking_factor` criterion

   (ie that the length of each side of each grid is divisible by :cpp:`blocking_factor` in that direction)

   is satisfied during this process.

#. Next, if :cpp:`refine_grid_layout = true` and there are more processors than grids

   at this level, then the grids at this level are further divided in order to ensure that

   no processors has less than one grid (at each level). (as long as the :cpp:`blocking_factor` criterion

   is not violated).

   at this level, then the grids at this level are further divided until Ngrids >= Nprocs

   (unless doing so would violate the:cpp:`blocking_factor` criterion).

#. The creation of grids at higher levels begins by tagging cells at the coarser level and follows

   the Berger-Rigoutsis clustering algorithm with the additional constraint of satisfying the :cpp:`blocking_factor` criterion.

   the Berger-Rigoutsis clustering algorithm with the additional constraint of satisfying

   the :cpp:`blocking_factor` criterion.