Simplify code for vmin/vmax & bins='log' in hexbin

Author: svank

lib/matplotlib/axes/_axes.py

@@ -4800,7 +4800,7 @@ def reduce_C_function(C: array) -> float
                                    f"can be supplied, ignoring bins={bins}")
             else:
                 norm = mcolors.LogNorm(vmin=vmin, vmax=vmax)
-                vmin, vmax = None, None
+                vmin = vmax = None
             bins = None
 
         if isinstance(norm, mcolors.LogNorm):

lib/matplotlib/tests/test_axes.py

@@ -786,7 +786,7 @@ def test_hexbin_log():
 
 
 def test_hexbin_log_clim():
-    x, y = (np.arange(200) / 200).reshape((2, 100))
+    x, y = np.arange(200).reshape((2, 100))
     fig, ax = plt.subplots()
     h = ax.hexbin(x, y, bins='log', vmin=2, vmax=100)
     assert h.get_clim() == (2, 100)