groupchat fix

swarms/structs/groupchat.py

@@ -248,7 +248,7 @@ class GroupChat:
         Raises:
             ValueError: If any required components are missing or invalid
         """
-        if len(self.agents)<2:
+        if len(self.agents) < 2:
             raise ValueError("At least two agents are required for a group chat")
         if self.speaker_fn is None:
             raise ValueError("No speaker function provided")