legend.facecolor/edgecolor described in whats_new

Author: Marek Rudnicki

doc/users/whats_new/rcparams.rst

@@ -11,3 +11,10 @@ Added "figure.titlesize" and "figure.titleweight" keys to rcParams
 
 Two new keys were added to rcParams to control the default font size and weight
 used by the figure title (as emitted by ``pyplot.suptitle()``).
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+Added "legend.facecolor" and "legend.edgecolor" keys to rcParams
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+The new keys control colors (background and edge) of legend patches.