Fix maxsplit=2

Author: rougier

examples/showcase/mandelbrot.py

@@ -65,7 +65,7 @@ def mandelbrot_set(xmin, xmax, ymin, ymax, xn, yn, maxiter, horizon=2.0):
 
     # Some advertisement for matplotlib
     year = time.strftime("%Y")
-    major, minor, micro = matplotlib.__version__.split('.', maxsplit=3)
+    major, minor, micro = matplotlib.__version__.split('.', maxsplit=2)
     text = ("The Mandelbrot fractal set\n"
             "Rendered with matplotlib %s.%s, %s — http://matplotlib.org"
             % (major, minor, year))