2 typos in linalg mandates and preconditions sections

[iburyl]

[linalg.helpers.mandates] section:

template<class MDS1, class MDS2>
  requires(is-mdspan<MDS1> && is-mdspan<MDS2>)
  constexpr
  bool compatible-static-extents(size_t r1, size_t r2) {         // exposition only
    return MDS1::static_extent(r1) == dynamic_extent ||
           MDS2::static_extent(r2) == dynamic_extent ||
           MDS1::static_extent(r1) == MDS2::static_extent(r2));
  }

MDS2::static_extent(r2)); -> last parenthesis is redundant

[linalg.helpers.precond]

constexpr bool multipliable(                                     // exposition only
  const in-matrix auto& in_mat1, const in-matrix auto& in_mat2, const in-matrix auto& out_mat) {
  return out_mat.extent(0) == in_mat1.extent(0) && out_mat.extent(1) == in_mat2.extent(1) &&
         in1_mat.extent(1) == in_mat2.extent(0);
}

in1_mat.extent(1) == in_mat2.extent(0) -> in1_mat should be in_mat1

[tkoeppe]

Please send a PR!

[iburyl]

PR created: #7372