Merge pull request #5833 from ddkasa/fix-set-loading-return-type-docstring

Update `Widget.set_loading` Docstring

Author: willmcgugan

src/textual/widget.py

@@ -953,18 +953,15 @@ def get_loading_widget(self) -> Widget:
     def set_loading(self, loading: bool) -> None:
         """Set or reset the loading state of this widget.
 
-        A widget in a loading state will display a LoadingIndicator that obscures the widget.
+        A widget in a loading state will display a `LoadingIndicator` or a custom widget
+        set through overriding the `get_loading_widget` method.
 
         Args:
             loading: `True` to put the widget into a loading state, or `False` to reset the loading state.
-
-        Returns:
-            An optional awaitable.
         """
-        LOADING_INDICATOR_CLASS = "-textual-loading-indicator"
         if loading:
             loading_indicator = self.get_loading_widget()
-            loading_indicator.add_class(LOADING_INDICATOR_CLASS)
+            loading_indicator.add_class("-textual-loading-indicator")
             self._cover(loading_indicator)
         else:
             self._uncover()