Bug report

Passing the edgecolor="none" to the matplotlib.pyplot.bar does not remove the edges from the bars in the plot.

Code for reproduction

import numpy as np
import matplotlib.pyplot as plt

fig, ax = plt.subplots()
data = [61, 96, 75, 96]
ind = np.arange(len(data))

rects1 = ax.bar(ind, data, alpha=0.3, color="blue", edgecolor="none")

# This is a workaround that solves the problem and proves that the edgecolor argument is not used
# for r in rects1:
#     r.set_edgecolor("none")

plt.show()

Actual outcome

Expected outcome
(produced by adding the commented out code)

Matplotlib version

• Operating system: Linux Mint 18.3 Cinnamon 64-bit
• Cinnamon version: 3.6.7
• Linux Kernel: 4.4.0-122-generic
• Matplotlib version: 2.2.2
• Matplotlib backend (print(matplotlib.get_backend())): TkAgg
• Python version: 3.5.2

matplotlib installed by pip3 install matplotlib