Update contour.py

Author: sanrishi

lib/matplotlib/contour.py

@@ -1493,7 +1493,7 @@ def _initialize_x_y(self, z):
 
     If array-like, draw contour lines at the specified levels.
     The values must be in increasing order.
-    
+
     If not given, a reasonable default is automatically chosen. For linear
     scales, this corresponds to *n*=7, typically producing approximately
     8 contour levels. For logarithmic scales, `~matplotlib.ticker.LogLocator`