add API change documentation

Zybulon · Zybulon · commit 6a8031a7c6f2 · 2024-02-10T11:34:20.000+01:00
diff --git a/doc/api/next_api_changes/behavior/27744-FM.rst b/doc/api/next_api_changes/behavior/27744-FM.rst
@@ -0,0 +1,6 @@
+``NavigationToolbar2.save_figure`` now returns filepath of saved figure
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``NavigationToolbar2.save_figure`` function return the filename of the saved figure.
+If no figure is save then it returns None.
+For GTK4 backend and Web backend the still returns None.
diff --git a/lib/matplotlib/backend_bases.py b/lib/matplotlib/backend_bases.py
@@ -3230,7 +3230,8 @@ def save_figure(self, *args):
         Returns
         -------
         str or `None`
-            The filepath of the saved figure. For GTK4 and WebAgg backends it returns `None`.
+            The filepath of the saved figure.
+            For GTK4 and WebAgg backends it returns `None`.
             Returns `None` if figure is not saved.
         """
         raise NotImplementedError
