matplotlib PGF output: Contour labels extend beyond figure boundary

Taking the first example from the matplotlib examples page,

import matplotlib
import numpy as np
import matplotlib.cm as cm
import matplotlib.mlab as mlab
import matplotlib.pyplot as plt

matplotlib.rcParams['xtick.direction'] = 'out'
matplotlib.rcParams['ytick.direction'] = 'out'

delta = 0.025
x = np.arange(-3.0, 3.0, delta)
y = np.arange(-2.0, 2.0, delta)
X, Y = np.meshgrid(x, y)
Z1 = mlab.bivariate_normal(X, Y, 1.0, 1.0, 0.0, 0.0)
Z2 = mlab.bivariate_normal(X, Y, 1.5, 0.5, 1, 1)
# difference of Gaussians
Z = 10.0 * (Z2 - Z1)


# Create a simple contour plot with labels using default colors.  The
# inline argument to clabel will control whether the labels are draw
# over the line segments of the contour, removing the lines beneath
# the label
plt.figure()
CS = plt.contour(X, Y, Z)
plt.clabel(CS, inline=1, fontsize=10)
plt.title('Simplest default with labels')

plt.savefig('plot.pgf')

I have the problem that contour labels close to the axes (here, “0.000” at the very top) jut out beyond the figure boundary. Here is the output I get using LaTeX: As you can see, the label “0.000” at the top overlaps the black line.

Is there anything I can do to fix this? To be clear, my issue is not that the label is close to the axis. What I want is the same behavior as shown on the matplotlib page, namely that the plot content is clipped to the figure area, cutting off text as well as lines.

As shown in the corresponding bug report for matplotlib (#11375), matplotlib’s PGF backend does not support text clipping, which is causing this issue, which still seems to persist today.