Fixup some syntax issues in docstrings (#483)

langgraph/prebuilt/chat_agent_executor.py

@@ -274,7 +274,7 @@ def create_react_agent(
         ... ])
         >>> def modify_messages(messages: list):
         ...     # You can do more complex modifications here
-        ...     return prompt.invoke(messages=messages)
+        ...     return prompt.invoke({"messages": messages})
         >>>
         >>> app = create_react_agent(model, tools, messages_modifier=modify_messages)
         >>> inputs = {"messages": [("user", "What's your name? And what's the weather in SF?")]}

langgraph/prebuilt/tool_executor.py

@@ -55,6 +55,7 @@ class ToolExecutor(RunnableCallable):
 
     Examples:
 
+        ```pycon
         >>> from langchain_core.tools import tool
         >>> from langgraph.prebuilt.tool_executor import ToolExecutor, ToolInvocation
         ...
@@ -71,14 +72,17 @@ class ToolExecutor(RunnableCallable):
         >>> invocation = ToolInvocation(tool="search", tool_input="What is the capital of France?")
         >>> result = executor.invoke(invocation)
         >>> print(result)
-        Output: "Searching for: What is the capital of France?"
+        "Searching for: What is the capital of France?"
+        ```
 
+        ```pycon
         >>> invocation = ToolInvocation(
         ...     tool="nonexistent", tool_input="What is the capital of France?"
         ... )
         >>> result = executor.invoke(invocation)
         >>> print(result)
-        Output: "nonexistent is not a valid tool, try one of [search]."
+        "nonexistent is not a valid tool, try one of [search]."
+        ```
     """
 
     def __init__(

langgraph/prebuilt/tool_node.py

@@ -139,8 +139,8 @@ def tools_condition(
         >>> graph_builder.add_node("chatbot", llm.bind_tools(tools))
         >>> graph_builder.add_edge("tools", "chatbot")
         >>> graph_builder.add_conditional_edges(
-        >>>     "chatbot", tools_condition
-        >>> )
+        ...     "chatbot", tools_condition
+        ... )
         >>> graph_builder.set_entry_point("chatbot")
         >>> graph = graph_builder.compile()
         >>> graph.invoke([("user", "What's 329993 divided by 13662?")])