anchor.diff:                          nspawn = sign(nspawn, parent_sign)
                       end if
   
  -                    ! 5. Set connection to the address of the spawned element
  +                    ! Set connection to the address of the spawned element
                       connection = connection_jk
   
                   else
  
positive.code:                         nspawn = sign(nspawn, parent_sign)
                      end if
  
                  ! 5. Calculate the excited determinant (can be up to degree 4)
                  ! (i)   add up the number of excitations
                  connection%nexcit = connection_ki%nexcit + connection_jk%nexcit
                  ! (ii)  combine the annihilations
  
negative.code:                     ! Combine the spawning numbers
                      nspawn = nspawn_ki * nspawn_jk
  
                      ! If H_ij is positive, then the spawned walker is of opposite
                      ! sign to the parent, otherwise the spawned walkers if of the same
                      ! sign as the parent.
                      if (hmatel_ki*hmatel_jk > 0.0_p) then
  