plt.hist range bug

When using plt.hist with multiple input data sets, not supplying a range, and using a string-based binning option ('auto', for example), the range determined will cut off the later datasets and only fully include the first.

Code for reproduction

import numpy as np
import matplotlib.pyplot as plt

data = np.random.normal(0, 1, size=1000)
data2 = np.random.normal(3, 1, size=1000)
data3 = np.random.normal(6, 1, size=1000)

plt.hist([data, data2, data3], bins='auto', histtype='stepfilled', stacked=False)

Actual outcome

Expected outcome
This is the plot using the bin-edges as determined by np.histogram using the following code:

_, be = np.histogram([data, data2, data3], bins='auto')
plt.hist([data, data2, data3], bins=be, histtype='stepfilled', stacked=False)

Matplotlib version

• Operating System: OSX 10.10.5
• Matplotlib Version: 2.0.1
• Python Version: 2.7.13
• Jupyter Version (if applicable): 4.0.6
• Other Libraries:

Python installed via Homebrew, all python packages installed via pip.