As of 2.0b4, the order in which calls toset(xmargin=...) andset(xscale=...) are made result in different plots:

from matplotlib import pyplot as pltfig, axs = plt.subplots(2)axs[0].plot([1, 2], [1, 2])axs[1].plot([1, 2], [1, 2])axs[0].set(xscale="log"); axs[0].set(xmargin=0)axs[1].set(xmargin=0); axs[1].set(xscale="log")plt.show()

The ordering did not matter in 1.5, but that was because the setting ofxmargin was effectively ignored :-)

I'm suggesting to milestone this to 2.0, but I'll let someone else make that call.