message: Update formatting to latest rust release
  Apparently formatting has changed a tiny bit...
diff: @@ -146,7 +146,9 @@ impl Ldl {
  }
  FillInReduction::CAMDSuiteSparse => {
  #[cfg(not(feature = "sprs_suitesparse_camd"))]
  - panic!("Unavailable without the `sprs_suitesparse_camd` feature");
  + panic!(
  + "Unavailable without the `sprs_suitesparse_camd` feature"
  + );
  #[cfg(feature = "sprs_suitesparse_camd")]
  sprs_suitesparse_camd::camd(mat.structure_view())
  }
  