[clang-format][DFT] Use clang-format-9 for formatting (#548)

* A clang-format issue was identified in CI
* This issue comes from using different versions of clang-format
  *The correct version to use for oneMKL Interfaces is clang-format-9
* Reformat affected file with clang-format-9

src/dft/backends/portfft/commit.cpp

@@ -130,8 +130,7 @@ class portfft_commit final : public dft::detail::commit_impl<prec, dom> {
  bwd_desc.forward_offset = static_cast<std::size_t>(stride_vecs.offset_bwd_out);
  bwd_desc.backward_offset = static_cast<std::size_t>(stride_vecs.offset_bwd_in);
  bwd_desc.forward_strides = { stride_vecs.bwd_out.cbegin() + 1, stride_vecs.bwd_out.cend() };
- bwd_desc.backward_strides = { stride_vecs.bwd_in.cbegin() + 1,
- stride_vecs.bwd_in.cend() };
+ bwd_desc.backward_strides = { stride_vecs.bwd_in.cbegin() + 1, stride_vecs.bwd_in.cend() };
  bwd_desc.forward_distance = static_cast<std::size_t>(config_values.fwd_dist);
  bwd_desc.backward_distance = static_cast<std::size_t>(config_values.bwd_dist);