message: Change COO class comment
diff: @@ -49,9 +49,11 @@ template <typename ValueType, typename IndexType>
  class Csr;
  /**
  - * COO stores a matrix in the coordinate matrix format. That is, the nonzero
  - * elements are stored in a array complemented by two arrays containing the row
  - * and column indexes of each nonzero element of the matrix.
  + * COO stores a matrix in the coordinate matrix format.
  + *
  + * The nonzero elements are stored in an array row-wise (but not neccessarily
  + * sorted by column index within a row). Two extra arrays contain the row and
  + * column indexes of each nonzero element of the matrix.
  *
  * @tparam ValueType precision of matrix elements
  * @tparam IndexType precision of matrix indexes
  