Improve Llama v2 extract questions actor and associated prompt

- Format extract questions prompt format with newlines and whitespaces
- Make llama v2 extract questions prompt consistent

- Remove empty questions extracted by offline extract_questions actor
- Update implicit qs extraction unit test for offline search actor

src/khoj/processor/conversation/gpt4all/chat_model.py

@@ -113,7 +113,7 @@ def filter_questions(questions: List[str]):
     ]
     filtered_questions = []
     for q in questions:
-        if not any([word in q.lower() for word in hint_words]):
+        if not any([word in q.lower() for word in hint_words]) and not is_none_or_empty(q):
             filtered_questions.append(q)
 
     return filtered_questions

src/khoj/processor/conversation/prompts.py

@@ -23,7 +23,7 @@ no_notes_found = PromptTemplate.from_template(
     """.strip()
 )
 
-system_prompt_message_llamav2 = f"""You are Khoj, a friendly, smart and helpful personal assistant.
+system_prompt_message_llamav2 = f"""You are Khoj, a smart, inquisitive and helpful personal assistant.
 Using your general knowledge and our past conversations as context, answer the following question.
 If you do not know the answer, say 'I don't know.'"""
 
@@ -91,7 +91,7 @@ Question: {query}
 
 notes_conversation_llamav2 = PromptTemplate.from_template(
     """
-Notes:
+User's Notes:
 {references}
 Question: {query}
 """.strip()
@@ -135,13 +135,19 @@ Answer (in second person):"""
 extract_questions_llamav2_sample = PromptTemplate.from_template(
     """
 <s>[INST] <<SYS>>Current Date: {current_date}<</SYS>> [/INST]</s>
-<s>[INST]How was my trip to Cambodia?[/INST][]</s>
-<s>[INST]Who did I visit the temple with on that trip?[/INST]Who did I visit the temple with in Cambodia?</s>
-<s>[INST]How should I take care of my plants?[/INST]What kind of plants do I have? What issues do my plants have?</s>
-<s>[INST]How many tennis balls fit in the back of a 2002 Honda Civic?[/INST]What is the size of a tennis ball? What is the trunk size of a 2002 Honda Civic?</s>
-<s>[INST]What did I do for Christmas last year?[/INST]What did I do for Christmas {last_year} dt>='{last_christmas_date}' dt<'{next_christmas_date}'</s>
+<s>[INST] How was my trip to Cambodia? [/INST]
+How was my trip to Cambodia?</s>
+<s>[INST] Who did I visit the temple with on that trip? [/INST]
+Who did I visit the temple with in Cambodia?</s>
+<s>[INST] How should I take care of my plants? [/INST]
+What kind of plants do I have? What issues do my plants have?</s>
+<s>[INST] How many tennis balls fit in the back of a 2002 Honda Civic? [/INST]
+What is the size of a tennis ball? What is the trunk size of a 2002 Honda Civic?</s>
+<s>[INST] What did I do for Christmas last year? [/INST]
+What did I do for Christmas {last_year} dt>='{last_christmas_date}' dt<'{next_christmas_date}'</s>
 <s>[INST] How are you feeling today? [/INST]</s>
-<s>[INST]Is Alice older than Bob?[/INST]When was Alice born? What is Bob's age?</s>
+<s>[INST] Is Alice older than Bob? [/INST]
+When was Alice born? What is Bob's age?</s>
 <s>[INST] <<SYS>>
 Use these notes from the user's previous conversations to provide a response:
 {chat_history}

tests/test_gpt4all_chat_actors.py

@@ -128,15 +128,15 @@ def test_extract_multiple_explicit_questions_from_message(loaded_model):
 @pytest.mark.chatquality
 def test_extract_multiple_implicit_questions_from_message(loaded_model):
     # Act
-    response = extract_questions_offline("Is Morpheus taller than Neo?", loaded_model=loaded_model)
+    response = extract_questions_offline("Is Carl taller than Ross?", loaded_model=loaded_model)
 
     # Assert
-    expected_responses = ["height", "taller", "shorter", "heights"]
+    expected_responses = ["height", "taller", "shorter", "heights", "who"]
     assert len(response) <= 3
 
     for question in response:
         assert any([expected_response in question.lower() for expected_response in expected_responses]), (
-            "Expected chat actor to ask follow-up questions about Morpheus and Neo, but got: " + question
+            "Expected chat actor to ask follow-up questions about Carl and Ross, but got: " + question
         )