Merge pull request #987 from leminhman0312/fixComment

Fix spelling error in CSinglezoneDriver.cpp. Add missing comment for iteration_structure.hpp

Author: pcarruscag

SU2_CFD/include/drivers/CSinglezoneDriver.hpp

@@ -99,7 +99,7 @@ class CSinglezoneDriver : public CDriver {
   bool Monitor(unsigned long TimeIter) override;
 
   /*!
-     * \brief  Returns wheter all specified windowed-time-averaged ouputs have been converged
+     * \brief  Returns whether all specified windowed-time-averaged ouputs have been converged
      * \return Boolean indicating whether the problem is converged.
      */
   inline virtual bool GetTimeConvergence() const{

SU2_CFD/include/iteration_structure.hpp

@@ -101,7 +101,15 @@ class CIteration {
 
   /*!
    * \brief A virtual member.
-   * \param[in] ??? - Description here.
+   * \param[in] output - Pointer to the COutput class.
+   * \param[in] integration - Container vector with all the integration methods.
+   * \param[in] geometry - Geometrical definition of the problem.
+   * \param[in] solver - Container vector with all the solutions.
+   * \param[in] numerics - Description of the numerical method (the way in which the equations are solved).
+   * \param[in] config - Definition of the particular problem.
+   * \param[in] surface_movement - Surface movement classes of the problem.
+   * \param[in] grid_movement - Volume grid movement classes of the problem.
+   * \param[in] FFDBox - FFD FFDBoxes of the problem.
    */
   virtual void Preprocess(COutput *output,
                           CIntegration ****integration,