docs:misc fixes (#9671)

Improve internal consistency in LangChain documentation
- Change occurrences of eg and eg. to e.g.
- Fix headers containing unnecessary capital letters.
- Change instances of "few shot" to "few-shot".
- Add periods to end of sentences where missing.
- Minor spelling and grammar fixes.

docs/extras/integrations/callbacks/promptlayer.ipynb

@@ -11,7 +11,7 @@
     "\n",
     "[PromptLayer](https://promptlayer.com) is a an LLM observability platform that lets you visualize requests, version prompts, and track usage. In this guide we will go over how to setup the `PromptLayerCallbackHandler`. \n",
     "\n",
-    "While PromptLayer does have LLMs that integrate directly with LangChain (eg [`PromptLayerOpenAI`](https://python.langchain.com/docs/integrations/llms/promptlayer_openai)), this callback is the recommended way to integrate PromptLayer with LangChain.\n",
+    "While PromptLayer does have LLMs that integrate directly with LangChain (e.g. [`PromptLayerOpenAI`](https://python.langchain.com/docs/integrations/llms/promptlayer_openai)), this callback is the recommended way to integrate PromptLayer with LangChain.\n",
     "\n",
     "See [our docs](https://docs.promptlayer.com/languages/langchain) for more information."
    ]

docs/extras/integrations/document_loaders/git.ipynb

@@ -173,7 +173,7 @@
    "source": [
     "from langchain.document_loaders import GitLoader\n",
     "\n",
-    "# eg. loading only python files\n",
+    "# e.g. loading only python files\n",
     "loader = GitLoader(\n",
     "    repo_path=\"./example_data/test_repo1/\",\n",
     "    file_filter=lambda file_path: file_path.endswith(\".py\"),\n",

docs/extras/integrations/providers/datadog.mdx

@@ -52,7 +52,7 @@ Note that using `ddtrace-run` or `patch_all()` will also enable the `requests` a
 from ddtrace import config, patch
 
 # Note: be sure to configure the integration before calling ``patch()``!
-# eg. config.langchain["logs_enabled"] = True
+# e.g. config.langchain["logs_enabled"] = True
 
 patch(langchain=True)