message: fixed doc-string as suggested in review
diff: @@ -85,9 +85,10 @@ namespace detail {
  /**
  + * @internal
  * A lightweight dynamic block type on the host
  *
  - * @internal Currently used only while reading a FBCSR matrix from matrix_data.
  + * Currently used only while reading a FBCSR matrix from matrix_data.
  *
  * @tparam ValueType The numeric type of entries of the block
  */
  