docstrings corrections

fariza · fariza · commit 9e5b32ee5e4e · 2017-11-19T12:15:13.000-05:00
diff --git a/lib/matplotlib/backend_bases.py b/lib/matplotlib/backend_bases.py
@@ -3281,10 +3281,10 @@ def _get_image_filename(self, image):
 
     def btn_image_extension(self):
         """
-        Get the preferred image extension
+        Get the button image format extension
 
-        Return
-        ======
+        Returns
+        =======
         str: Image extension
         """
         raise NotImplementedError
