docs: def PROFILE_VOIGT(sg0,GamD,Gam0,sg):
      """
      # Voigt profile based on HTP.
      # Input parameters:
      #   sg0: Unperturbed line position in cm-1 (Input).
      #   GamD: Doppler HWHM in cm-1 (Input)
      #   Gam0: Speed-averaged line-width in cm-1 (Input).       
      #   sg: Current WaveNumber of the Computation in cm-1 (Input).
      """
      return PROFILE_HTP(sg0,GamD,Gam0,cZero,cZero,cZero,cZero,cZero,sg)