docs: clarify config model[_].name and add multiline prompt examples

Based on feedback from #2

config-example.toml

@@ -2,12 +2,13 @@ data_dir = "./data"
 sample = 8
 
 [[model]]
-# Entries other than `name` are passed to `openai.OpenAI` or `openai.OpenAI.chat.completion.create`
+# Internal identifier for your own record. Used when storing and presenting the results.
 name = "chatglm3-6b-sft-checkpoint100"
+# Entries other than `name` are passed to `openai.OpenAI` or `openai.OpenAI.chat.completion.create`
 base_url = "http://localhost:8000/v1"
 api_key = "dummy-key"
 max_retries = 1
-model = ""
+model = "dummy-model-name"
 
 [[model]]
 name = "gpt-3.5"
@@ -20,14 +21,18 @@ model = "gpt-3.5-turbo"
 name = "demo-sleep-zh"
 chat = """
 user: 睡不着怎么办？
-assistant: 你可以试试给我讲个故事呀。
+assistant: 你可以……
+（略作沉思）
+试试给我讲个故事呀。
 user: 诶嘿，那你想听什么样的故事呢？
 """
 
 [[prompt]]
 name = "demo-sleep-en"
 chat = """
 user: What should I do if I can't fall asleep?
-assistant: Hmmm, maybe you can try telling me a story.
+assistant: Hmmm, maybe...
+*pondering*
+you can try telling me a story.
 user: lol, what kind of story do you like?
 """