FIX: Change hot gist prompt to avoid title repeating #859 (#859)

Co-authored-by: Roman Rizzi <rizziromanalejandro@gmail.com>

lib/summarization/strategies/hot_topic_gists.rb

@@ -100,25 +100,26 @@ module DiscourseAi
             contents.to_a.map { |item| "(#{item[:id]} #{item[:poster]} said: #{item[:text]} " }
 
           prompt = DiscourseAi::Completions::Prompt.new(<<~TEXT.strip)
-            You are an advanced summarization bot. Analyze a given conversation and produce a concise, 
+            You are an advanced summarization bot. Analyze a given conversation and produce a concise,
             single-sentence summary that conveys the main topic and current developments to someone with no prior context.
 
             ### Guidelines:
-          
+
             - Emphasize the most recent updates while considering their significance within the original post.
             - Focus on the central theme or issue being addressed, maintaining an objective and neutral tone.
             - Exclude extraneous details or subjective opinions.
             - Use the original language of the text.
             - Begin directly with the main topic or issue, avoiding introductory phrases.
             - Limit the summary to a maximum of 20 words.
-            - Return the 20-word summary inside <ai></ai> tags.
+            - Do *NOT* repeat the discussion title in the summary.
 
+            Return the summary inside <ai></ai> tags.\n
           TEXT
 
           context = +<<~TEXT
             ### Context:
-            
-            #{content_title.present? ? "The discussion title is: " + content_title + ".\n" : ""}
+
+            #{content_title.present? ? "The discussion title is: " + content_title + ". (DO NOT REPEAT THIS IN THE SUMMARY)\n" : ""}
             
             The conversation began with the following statement:
         
@@ -130,7 +131,7 @@ module DiscourseAi
               Subsequent discussion includes the following:
 
               #{statements.join("\n")}
-                  
+
               Your task is to focus on these latest messages, capturing their meaning in the context of the initial statement.
             TEXT
           else