fix: correct RST docstring formatting in GroupedLayerControl (fixes #2233) (#2234)

Author: Kakarot35

folium/plugins/groupedlayercontrol.py

@@ -13,13 +13,14 @@ class GroupedLayerControl(JSCSSMixin, MacroElement):
     ----------
     groups : dict
         A dictionary where the keys are group names and the values are lists
-        of layer objects. E.g.
-        {
-            "Group 1": [layer1, layer2],
-            "Group 2": [layer3, layer4]
-        }
+        of layer objects. For example::
 
-    exclusive_groups: bool, default True
+            {
+                "Group 1": [layer1, layer2],
+                "Group 2": [layer3, layer4]
+            }
+
+    exclusive_groups : bool, default True
         Whether to use radio buttons (default) or checkboxes.
         If you want to use both, use two separate instances of this class.
     **kwargs