old_contents: " vertical tail "
  from gpkit import parse_variables
  from .tail_aero import TailAero
  from gpkitmodels.GP.aircraft.wing.wing import Wing
  from gpkitmodels.GP.aircraft.wing.wing_core import WingCore
  from gpkitmodels.GP.aircraft.wing.wing_skin import WingSkin
  
  #pylint: disable=attribute-defined-outside-init, no-member, exec-used
  
  class VerticalTail(Wing):
      """ Vertical Tail Model
  
      Variables
      ---------
      Vv                  [-]         vertical tail volume coefficient
      lv                  [ft]        vertical tail moment arm
  
      Upper Unbounded
      ---------------
      lv, Vv, W
  
      Lower Unbounded
      ---------------
      lv, Vv, b
  
      LaTex Strings
      -------------
      Vv      V_{\\mathrm{v}}
      lv      l_{\\mathrm{v}}
  
      """
  
      flight_model = TailAero
      fillModel = WingCore
      sparModel = None
  
      def setup(self, N=3):
          exec parse_variables(VerticalTail.__doc__)
  
          self.ascs = Wing.setup(self, N)
          self.planform.substitutions.update(
              {self.planform.tau: 0.08, self.planform.lam: 0.8,
               self.planform.AR: 4})
          if self.fillModel:
              self.foam.substitutions.update({self.foam.Abar: 0.0548,
                                              self.foam.material.rho: 0.024})
  
          return self.ascs, self.components
  
new_contents: " vertical tail "
  from gpkit import parse_variables
  from .tail_aero import TailAero
  from gpkitmodels.GP.aircraft.wing.wing import Wing
  from gpkitmodels.GP.aircraft.wing.wing_core import WingCore
  from gpkitmodels.GP.aircraft.wing.wing_skin import WingSkin
  
  #pylint: disable=attribute-defined-outside-init, no-member, exec-used
  
  class VerticalTail(Wing):
      """ Vertical Tail Model
  
      Variables
      ---------
      Vv                  [-]         vertical tail volume coefficient
      lv                  [ft]        vertical tail moment arm
  
      Upper Unbounded
      ---------------
      lv, Vv, W
  
      Lower Unbounded
      ---------------
      lv, Vv, b
  
      LaTex Strings
      -------------
      Vv      V_{\\mathrm{v}}
      lv      l_{\\mathrm{v}}
  
      """
  
      flight_model = TailAero
      fillModel = WingCore
      sparModel = None
  
      def setup(self, N=3):
          exec parse_variables(VerticalTail.__doc__)
  
          self.ascs = Wing.setup(self, N)
          self.planform.substitutions.update(
              {self.planform.tau: 0.08, self.planform.lam: 0.8,
               self.planform.AR: 4})
          if self.fillModel:
              self.foam.substitutions.update({self.foam.Abar: 0.0548,
                                              self.foam.material.rho: 0.024})
  
          return self.ascs
  
subject: remove duplicate vertical tail constraints (#143)