pep8: Fixes.

src/View/HydraulicStructures/PlotAC.py

@@ -106,13 +106,13 @@ class PlotAC(PamhyrPlot):
         self.update()
 
     def update(self):
-
         if self.line_kp is None:
             self.draw()
         else:
             if self._current_reach is None or self._current_profile is None:
                 self.clear()
                 return
+
             profile = self._current_profile
             x = profile.get_station()
             z = profile.z()