Add/fix samples for Claude pre-fill and system messages

docs/my-website/docs/providers/anthropic.md

@@ -50,6 +50,44 @@ response = completion(model="claude-2.1", messages=messages)
 print(response)
 ```
 
+### Example prompt sent to Claude
+
+```
+
+Human: How do you say 'Hello' in German? Return your answer as a JSON object, like this:
+
+{ "Hello": "Hallo" }
+
+Assistant: {
+```
+
+## Usage - "System" messages
+If you're using Anthropic's Claude 2.1 with Bedrock, `system` role messages are properly formatted for you.
+
+```python
+import os
+from litellm import completion
+
+# set env - [OPTIONAL] replace with your anthropic key
+os.environ["ANTHROPIC_API_KEY"] = "your-api-key"
+
+messages = [
+    {"role": "system", "content": "You are a snarky assistant."},
+    {"role": "user", "content": "How do I boil water?"},
+]
+response = completion(model="claude-2.1", messages=messages)
+```
+
+### Example prompt sent to Claude
+
+```
+You are a snarky assistant.
+
+Human: How do I boil water?
+
+Assistant:
+```
+
 ## Streaming
 Just set `stream=True` when calling completion.
 

docs/my-website/docs/providers/bedrock.md

@@ -56,6 +56,17 @@ messages = [
 response = completion(model="anthropic.claude-v2", messages=messages)
 ```
 
+### Example prompt sent to Claude
+
+```
+
+Human: How do you say 'Hello' in German? Return your answer as a JSON object, like this:
+
+{ "Hello": "Hallo" }
+
+Assistant: {
+```
+
 ## Usage - "System" messages
 If you're using Anthropic's Claude 2.1 with Bedrock, `system` role messages are properly formatted for you.