account for the classic style in the mpl tests; need to specify none for both c and ec to ensure invisibility, in classic black edges are default

Author: lukashergt

lib/matplotlib/tests/test_legend.py

@@ -1240,7 +1240,7 @@ def test_legend_labelcolor_linecolor_plot():
     assert mpl.colors.same_color(tc, p[0].get_markerfacecolor())
 
     fig, ax = plt.subplots()
-    p = ax.plot(x, 'o', c='none', label="invisible circles with invisible label")
+    p = ax.plot(x, 'o', c='none', mec='none', label="invisible circles and label")
     leg = ax.legend(loc=1, labelcolor='linecolor')
     tc = leg.texts[0].get_color()
     assert tc == 'none'
@@ -1299,7 +1299,7 @@ def test_legend_labelcolor_linecolor_scatter():
     assert mpl.colors.same_color(tc, p.get_facecolor())
 
     fig, ax = plt.subplots()
-    p = ax.scatter(x, x, c='none', label="invisible circles with invisible label")
+    p = ax.scatter(x, x, c='none', ec='none', label="invisible circles and label")
     leg = ax.legend(loc=1, labelcolor='linecolor')
     tc = leg.texts[0].get_color()
     assert tc == 'none'