fix weird bold issues in docs (#7198)

langchain/schema/prompt_template.py

@@ -146,9 +146,11 @@ def format_document(doc: Document, prompt: BasePromptTemplate) -> str:
 
     First, this pulls information from the document from two sources:
 
-    1. `page_content`: this takes the information from the `document.page_content`
+    1. `page_content`:
+        This takes the information from the `document.page_content`
         and assigns it to a variable named `page_content`.
-    2. metadata: this takes information from `document.metadata` and assigns
+    2. metadata:
+        This takes information from `document.metadata` and assigns
         it to variables of the same name.
 
     Those variables are then passed into the `prompt` to produce a formatted string.