Clarify keyword argument in error message

jpeloquin · jpeloquin · commit a158469c79d6 · 2020-09-02T18:42:02.000-04:00
GridSpec has a `figure` keyword argument, not a `fig` keyword argument.

The error message can be produced using a snippet like the following:

from matplotlib.figure import Figure
from matplotlib.gridspec import GridSpec
fig = Figure(constrained_layout=True)
gs = GridSpec(1, 1)
ax = fig.add_subplot(gs[0])
ax.plot([0, 1], [0, 1])
fig.savefig("temp.svg")
diff --git a/lib/matplotlib/figure.py b/lib/matplotlib/figure.py
@@ -2591,7 +2591,7 @@ def execute_constrained_layout(self, renderer=None):
             cbook._warn_external("Calling figure.constrained_layout, but "
                                  "figure not setup to do constrained layout. "
                                  " You either called GridSpec without the "
-                                 "fig keyword, you are using plt.subplot, "
+                                 "figure keyword, you are using plt.subplot, "
                                  "or you need to call figure or subplots "
                                  "with the constrained_layout=True kwarg.")
             return
