code: def test_default_edges():
      # Remove this line when this test image is regenerated.
      plt.rcParams["text.kerning_factor"] = 6
  
      fig, [[ax1, ax2], [ax3, ax4]] = plt.subplots(2, 2)
  
      ax1.plot(
          np.arange(10),
          np.arange(10),
          "x",
          np.arange(10) + 1,
          np.arange(10),
          "o",
      )
      ax2.bar(np.arange(10), np.arange(10), align="edge")
      ax3.text(0, 0, "BOX", size=24, bbox=dict(boxstyle="sawtooth"))
      ax3.set_xlim((-1, 1))
      ax3.set_ylim((-1, 1))
      pp1 = mpatches.PathPatch(
          mpath.Path(
              [(0, 0), (1, 0), (1, 1), (0, 0)],
              [
                  mpath.Path.MOVETO,
                  mpath.Path.CURVE3,
                  mpath.Path.CURVE3,
                  mpath.Path.CLOSEPOLY,
              ],
          ),
          fc="none",
          transform=ax4.transData,
      )
      ax4.add_patch(pp1)
  
imports: import io
  from itertools import chain
  import numpy
  import pytest
  import matplotlib.colors
  import matplotlib.pyplot
  import matplotlib.patches
  import matplotlib.lines
  import matplotlib.path
  import matplotlib.transforms
  import matplotlib.collections
  import matplotlib.artist
  import matplotlib.backend_bases
  import matplotlib
  from matplotlib.testing.decorators import check_figures_equal, image_comparison
label_desc: Use image node_id 8 for calling a global function with example usage: test_default_edges() without return types