flake8 may forgive me

Author: echedey-ls

docs/examples/solar-tracking/plot_single_axis_tracking_on_sloped_terrain.py

@@ -145,7 +145,7 @@
 
 # calculate the cross-axis tilt:
 cross_axis_slope = tracking.calc_cross_axis_slope(slope_azimuth, slope_tilt,
-                                                axis_azimuth, axis_slope)
+                                                  axis_azimuth, axis_slope)
 
 print('Axis tilt:', '{:0.01f}°'.format(axis_slope))
 print('Cross-axis tilt:', '{:0.01f}°'.format(cross_axis_slope))