Refactor line breaks for improved readability

Author: llalitkumarrr

src/google/adk/runners.py

@@ -528,16 +528,16 @@ async def _run_node_async(
           yield user_event
 
       # Run before_run callbacks
-      corrected_user_message = await ic.plugin_manager.run_before_run_callback(invocation_context=ic)
+      corrected_user_message = await ic.plugin_manager.run_before_run_callback(
+        invocation_context=ic
+      )
       if corrected_user_message is not None:
         if isinstance(corrected_user_message, types.Content):
           node_input = corrected_user_message
           ic.user_content = corrected_user_message
           if hasattr(ic.session, 'events') and len(ic.session.events) > 0:
-              ic.session.events.pop()
-          user_event = await self._append_user_event(
-              ic, corrected_user_message
-          )
+            ic.session.events.pop()
+          user_event = await self._append_user_event(ic, corrected_user_message)
           if yield_user_message and user_event:
             yield user_event