Added missing comments and removed author and date from common/m_var_conversion

Author: anshgupta1234

src/common/m_variables_conversion.fpp

@@ -1,17 +1,11 @@
 !>
 !! @file m_variables_conversion.f90
 !! @brief Contains module m_variables_conversion
-!! @author A. Gupta
-!! @version 1.0
-!! @date NOV 14 2022
-
-!> @brief This module features a procedural pointer for calculating pressure
-!!              based on the model type and whether there are bubbles present.
-!!              There are 3 different subroutines: 
-!!                             1) s_compute_pressure_from_energy => when model_eqns != 4 and there are no bubbles
-!!                             2) s_compute_pressure_from_bubbles => when model_eqns != 4 and there are bubbles
-!!                             3) s_compute_pressure_4eqns => when model_eqns == 4
 
+!> @brief This module consists of subroutines used in the conversion of the
+!!              conservative variables into the primitive ones and vice versa. In
+!!              addition, the module also contains the subroutines used to obtain
+!!              the mixture variables and the subroutines used to compute pressure.
 module m_variables_conversion
 
     ! Dependencies =============================================================
@@ -234,6 +228,18 @@ contains
 
     end subroutine s_compute_pressure
 
+    !>  This subroutine is designed for the gamma/pi_inf model
+        !!      and provided a set of either conservative or primitive
+        !!      variables, transfers the density, specific heat ratio
+        !!      function and the liquid stiffness function from q_vf to
+        !!      rho, gamma and pi_inf.
+        !! @param q_vf conservative or primitive variables
+        !! @param i cell index to transfer mixture variables
+        !! @param j cell index to transfer mixture variables
+        !! @param k cell index to transfer mixture variables
+        !! @param rho density
+        !! @param gamma  specific heat ratio function
+        !! @param pi_inf liquid stiffness
     subroutine s_convert_mixture_to_mixture_variables(q_vf, i, j, k, &
                                                       rho, gamma, pi_inf, Re_K, G_K, G)