fix: fix formatting of system message

src/gpt.py

@@ -93,9 +93,9 @@ class _GPTConversation:
         if 'executor' in system_definition_examples:
             system_message += f'\n{executor_example}'
         if 'docarray' in system_definition_examples:
-            system_message += f'{docarray_example}'
+            system_message += f'\n{docarray_example}'
         if 'client' in system_definition_examples:
-            system_message += f'{client_example}'
+            system_message += f'\n{client_example}'
         self.prompt_list[0] = ('system', system_message)
 
     def get_response_from_stream(self, response_generator):

src/prompt_system.py

@@ -27,14 +27,16 @@ An Executor gets a DocumentArray as input and returns a DocumentArray as output.
 docarray_example = f'''A DocumentArray is a python class that can be seen as a list of Documents.
 A Document is a python class that represents a single document.
 Here is the protobuf definition of a Document:
-
+```
 message DocumentProto {{
   // used to store json data the executor gets and returns
   string text = 1;
 }}
+```
 
 Here are examples of how a DocumentArray can be defined:
 
+```
 from jina import DocumentArray, Document
 import json
 
@@ -52,6 +54,7 @@ array_list = array.tolist()
 d3 = Document(text=json.dumps(array_list))
 d4 = Document()
 d4.text = '{{"uri": "https://.../logo.png"}}'
+```
 '''