do not force the prompt file to end with a new line (#908)

.editorconfig

@@ -14,3 +14,6 @@ indent_size = 4
 
 [Makefile]
 indent_style = tab
+
+[prompts/*.txt]
+insert_final_newline = unset

prompts/chat-with-bob.txt

@@ -4,4 +4,4 @@ User: Hello, Bob.
 Bob: Hello. How may I help you today?
 User: Please tell me the largest city in Europe.
 Bob: Sure. The largest city in Europe is Moscow, the capital of Russia.
-User:
+User:

prompts/reason-act.txt

@@ -15,4 +15,4 @@ Answer: The calculate tool says it is 9.3333333333
 Question: What is capital of france?
 Thought: Do I need to use an action? No, I know the answer
 Answer: Paris is the capital of France
-Question:
+Question: