message: ENH: make BVH default to SEQ_EXEC
  Make the execution space template argument to the BVH default
  to SEQ_EXEC, if an execution space is not provided.
diff: @@ -114,7 +114,9 @@ enum BVHReturnCodes
  * \endcode
  *
  */
  -template < int NDIMS, typename ExecSpace, typename FloatType = double >
  +template < int NDIMS,
  + typename ExecSpace = axom::SEQ_EXEC,
  + typename FloatType = double >
  class BVH
  {
  private:
  