diff --git a/autogpt/agent/agent_manager.py b/autogpt/agent/agent_manager.py
index 3db2fdd6..85b61b71 100644
--- a/autogpt/agent/agent_manager.py
+++ b/autogpt/agent/agent_manager.py
@@ -47,7 +47,8 @@ class AgentManager(metaclass=Singleton):
         for i, plugin in enumerate(self.cfg.plugins):
             plugin_result = plugin.on_instruction(messages)
             if plugin_result:
-                plugins_reply = f"{plugins_reply}{'' if not i else '\n'}{plugin_result}"
+                sep = '' if not i else '\n'
+                plugins_reply = f"{plugins_reply}{sep}{plugin_result}"
 
         if plugins_reply and plugins_reply != "":
             messages.append({"role": "assistant", "content": plugins_reply})
@@ -96,7 +97,8 @@ class AgentManager(metaclass=Singleton):
         for i, plugin in enumerate(self.cfg.plugins):
             plugin_result = plugin.on_instruction(messages)
             if plugin_result:
-                plugins_reply = f"{plugins_reply}{'' if not i else '\n'}{plugin_result}"
+                sep = '' if not i else '\n'
+                plugins_reply = f"{plugins_reply}{sep}{plugin_result}"
         # Update full message history
         if plugins_reply and plugins_reply != "":
             messages.append({"role": "assistant", "content": plugins_reply})