Apply suggestions from code review

Co-authored-by: TobiKattmann <31306376+TobiKattmann@users.noreply.github.com>

Author: pcarruscag

Common/include/linear_algebra/blas_structure.hpp

@@ -483,12 +483,12 @@ class CBlasStructure {
   }
 
   /*!
-   * \brief Tridiagonal matrix algorithm.
-   * \param[in] lower diagonal
-   * \param[in] main diagonal
-   * \param[in,out] upper diagonal (modified on exit)
+   * \brief Algorithm to solve a linear system with a tridiagonal matrix.
+   * \param[in] lower - lower diagonal
+   * \param[in] main - main diagonal
+   * \param[in,out] upper - upper diagonal (modified on exit)
    * \param[in,out] rhs - right hand side on entry, solution on exit
-   * \note Same size for all vectors.
+   * \note Same size for all vectors. Use column index for lower and upper vector.
    */
   template<class Vec, class Scalar = su2double>
   static void tdma(const Vec& lower, const Vec& main, Vec& upper, Vec& rhs) {

Common/src/toolboxes/C1DInterpolation.cpp

@@ -40,7 +40,7 @@ su2double CAkimaInterpolation::EvaluateSpline(su2double Point_Interp) const {
 
   if (i >= x.size()-1) return (Point_Interp <= x[0])? y.front() : y.back();
 
-  su2double h = Point_Interp-x[i];
+  const su2double h = Point_Interp-x[i];
 
   return y[i]+h*(b[i]+h*(c[i]+h*d[i]));
 }