docs: Fix URL formatting in deprecation warnings (#23075)

**Description**

Updated the URLs in deprecation warning messages. The URLs were
previously written as raw strings and are now formatted to be clickable
HTML links.

Example of a broken link in the current API Reference:
https://api.python.langchain.com/en/latest/chains/langchain.chains.openai_functions.extraction.create_extraction_chain_pydantic.html

<img width="942" alt="Screenshot 2024-06-18 at 13 21 07"
src="https://github.com/langchain-ai/langchain/assets/4854600/a1b1863c-cd03-4af2-a9bc-70375407fb00">

libs/community/langchain_community/agent_toolkits/zapier/toolkit.py

@@ -54,7 +54,7 @@ class ZapierToolkit(BaseToolkit):
             since="0.0.319",
             message=(
                 "This tool will be deprecated on 2023-11-17. See "
-                "https://nla.zapier.com/sunset/ for details"
+                "<https://nla.zapier.com/sunset/> for details"
             ),
         )
         return self.tools

libs/community/langchain_community/chat_message_histories/postgres.py

@@ -22,7 +22,7 @@ DEFAULT_CONNECTION_STRING = "postgresql://postgres:mypassword@localhost/chat_his
         "You can swap to using the `PostgresChatMessageHistory`"
         " implementation in `langchain_postgres`. "
         "Please do not submit further PRs to this class."
-        "See https://github.com/langchain-ai/langchain-postgres"
+        "See <https://github.com/langchain-ai/langchain-postgres>"
     ),
     alternative="from langchain_postgres import PostgresChatMessageHistory;",
     pending=True,

libs/community/langchain_community/tools/zapier/tool.py

@@ -134,7 +134,7 @@ class ZapierNLARunAction(BaseTool):
             since="0.0.319",
             message=(
                 "This tool will be deprecated on 2023-11-17. See "
-                "https://nla.zapier.com/sunset/ for details"
+                "<https://nla.zapier.com/sunset/> for details"
             ),
         )
         return self.api_wrapper.run_as_str(self.action_id, instructions, self.params)
@@ -149,7 +149,7 @@ class ZapierNLARunAction(BaseTool):
             since="0.0.319",
             message=(
                 "This tool will be deprecated on 2023-11-17. See "
-                "https://nla.zapier.com/sunset/ for details"
+                "<https://nla.zapier.com/sunset/> for details"
             ),
         )
         return await self.api_wrapper.arun_as_str(
@@ -186,7 +186,7 @@ class ZapierNLAListActions(BaseTool):
             since="0.0.319",
             message=(
                 "This tool will be deprecated on 2023-11-17. See "
-                "https://nla.zapier.com/sunset/ for details"
+                "<https://nla.zapier.com/sunset/> for details"
             ),
         )
         return self.api_wrapper.list_as_str()
@@ -201,7 +201,7 @@ class ZapierNLAListActions(BaseTool):
             since="0.0.319",
             message=(
                 "This tool will be deprecated on 2023-11-17. See "
-                "https://nla.zapier.com/sunset/ for details"
+                "<https://nla.zapier.com/sunset/> for details"
             ),
         )
         return await self.api_wrapper.alist_as_str()

libs/community/langchain_community/vectorstores/pgvector.py

@@ -218,7 +218,7 @@ def _results_to_docs(docs_and_scores: Any) -> List[Document]:
         "Please read the guidelines in the doc-string of this class "
         "to follow prior to migrating as there are some differences "
         "between the implementations. "
-        "See https://github.com/langchain-ai/langchain-postgres for details about"
+        "See <https://github.com/langchain-ai/langchain-postgres> for details about"
         "the new implementation."
     ),
     alternative="from langchain_postgres import PGVector;",

libs/core/langchain_core/utils/loading.py

@@ -12,7 +12,7 @@ from langchain_core._api.deprecation import deprecated
     message=(
         "Using the hwchase17/langchain-hub "
         "repo for prompts is deprecated. Please use "
-        "https://smith.langchain.com/hub instead."
+        "<https://smith.langchain.com/hub> instead."
     ),
 )
 def try_load_from_hub(

libs/langchain/langchain/_api/module_import.py

@@ -101,7 +101,7 @@ def create_importer(
                                 f">> from {new_module} import {name}\n"
                                 "You can use the langchain cli to **automatically** "
                                 "upgrade many imports. Please see documentation here "
-                                "https://python.langchain.com/v0.2/docs/versions/v0_2/ "
+                                "<https://python.langchain.com/v0.2/docs/versions/v0_2/>"
                             ),
                         )
                 return result
@@ -133,7 +133,7 @@ def create_importer(
                                 f">> from {fallback_module} import {name}\n"
                                 "You can use the langchain cli to **automatically** "
                                 "upgrade many imports. Please see documentation here "
-                                "https://python.langchain.com/v0.2/docs/versions/v0_2/ "
+                                "<https://python.langchain.com/v0.2/docs/versions/v0_2/>"
                             ),
                         )
                 return result

libs/langchain/langchain/chains/openai_functions/extraction.py

@@ -50,13 +50,13 @@ Passage:
         "LangChain has introduced a method called `with_structured_output` that"
         "is available on ChatModels capable of tool calling."
         "You can read more about the method here: "
-        "https://python.langchain.com/docs/modules/model_io/chat/structured_output/"
+        "<https://python.langchain.com/docs/modules/model_io/chat/structured_output/>. "
         "Please follow our extraction use case documentation for more guidelines"
         "on how to do information extraction with LLMs."
-        "https://python.langchain.com/docs/use_cases/extraction/."
+        "<https://python.langchain.com/docs/use_cases/extraction/>. "
         "If you notice other issues, please provide "
         "feedback here:"
-        "https://github.com/langchain-ai/langchain/discussions/18154"
+        "<https://github.com/langchain-ai/langchain/discussions/18154>"
     ),
     removal="0.3.0",
     alternative=(
@@ -120,13 +120,13 @@ def create_extraction_chain(
         "LangChain has introduced a method called `with_structured_output` that"
         "is available on ChatModels capable of tool calling."
         "You can read more about the method here: "
-        "https://python.langchain.com/docs/modules/model_io/chat/structured_output/"
+        "<https://python.langchain.com/docs/modules/model_io/chat/structured_output/>. "
         "Please follow our extraction use case documentation for more guidelines"
         "on how to do information extraction with LLMs."
-        "https://python.langchain.com/docs/use_cases/extraction/."
+        "<https://python.langchain.com/docs/use_cases/extraction/>. "
         "If you notice other issues, please provide "
         "feedback here:"
-        "https://github.com/langchain-ai/langchain/discussions/18154"
+        "<https://github.com/langchain-ai/langchain/discussions/18154>"
     ),
     removal="0.3.0",
     alternative=(

libs/langchain/langchain/chains/openai_tools/extraction.py

@@ -20,14 +20,14 @@ If a property is not present and is not required in the function parameters, do
         "LangChain has introduced a method called `with_structured_output` that"
         "is available on ChatModels capable of tool calling."
         "You can read more about the method here: "
-        "https://python.langchain.com/docs/modules/model_io/chat/structured_output/"
+        "<https://python.langchain.com/docs/modules/model_io/chat/structured_output/>. "
         "Please follow our extraction use case documentation for more guidelines"
         "on how to do information extraction with LLMs."
-        "https://python.langchain.com/docs/use_cases/extraction/."
+        "<https://python.langchain.com/docs/use_cases/extraction/>. "
         "with_structured_output does not currently support a list of pydantic schemas. "
         "If this is a blocker or if you notice other issues, please provide "
         "feedback here:"
-        "https://github.com/langchain-ai/langchain/discussions/18154"
+        "<https://github.com/langchain-ai/langchain/discussions/18154>"
     ),
     removal="0.3.0",
     alternative=(

libs/langchain/langchain/chains/structured_output/base.py

@@ -32,13 +32,13 @@ from langchain_core.utils.function_calling import (
         "LangChain has introduced a method called `with_structured_output` that "
         "is available on ChatModels capable of tool calling. "
         "You can read more about the method here: "
-        "https://python.langchain.com/docs/modules/model_io/chat/structured_output/ "
+        "<https://python.langchain.com/docs/modules/model_io/chat/structured_output/>. "
         "Please follow our extraction use case documentation for more guidelines "
         "on how to do information extraction with LLMs. "
-        "https://python.langchain.com/docs/use_cases/extraction/. "
+        "<https://python.langchain.com/docs/use_cases/extraction/>. "
         "If you notice other issues, please provide "
         "feedback here: "
-        "https://github.com/langchain-ai/langchain/discussions/18154"
+        "<https://github.com/langchain-ai/langchain/discussions/18154>"
     ),
     removal="0.3.0",
     alternative=(
@@ -150,13 +150,13 @@ def create_openai_fn_runnable(
         "LangChain has introduced a method called `with_structured_output` that "
         "is available on ChatModels capable of tool calling. "
         "You can read more about the method here: "
-        "https://python.langchain.com/docs/modules/model_io/chat/structured_output/ "
+        "<https://python.langchain.com/docs/modules/model_io/chat/structured_output/>."
         "Please follow our extraction use case documentation for more guidelines "
         "on how to do information extraction with LLMs. "
-        "https://python.langchain.com/docs/use_cases/extraction/. "
+        "<https://python.langchain.com/docs/use_cases/extraction/>. "
         "If you notice other issues, please provide "
         "feedback here: "
-        "https://github.com/langchain-ai/langchain/discussions/18154"
+        "<https://github.com/langchain-ai/langchain/discussions/18154>"
     ),
     removal="0.3.0",
     alternative=(