improve preaudit instructions

bot.py

@@ -109,7 +109,10 @@ def preaudit(update: Update, context: CallbackContext) -> None:
         code_content = response.text
 
         prompt = '''
-/- Match the natspec documentation made for each function in the code above with its code, for each function list the differences if they don't match perfectly. Make it a list with function signatures and assessments for parts that do not match. You can NEVER say that code is too long to make a review, you have more context size than the source code to craft your answer so you are allowed to make big analysis.
+/- Match the natspec documentation made for each function in the code above with its code, for each function list the differences if they don't match perfectly.
+/- Make it a list with function signatures and assessments for parts that do not match.
+/- You can NEVER say that code is too long to make a review, you have more context size than the source code to craft your answer so you are allowed to make big analysis.
+/- For large codebases it's ok to analyze only the most important functions (normally the external ones).
 '''
         messages = [
             {
@@ -238,4 +241,4 @@ def main() -> None:
     updater.idle()
 
 if __name__ == '__main__':
-    main()
+    main()