refactor: Simplify reasoning tag handling and remove unused function

aider/coders/base_coder.py

@@ -1743,11 +1743,13 @@ class Coder:
         show_resp = self.render_incremental_response(True)
 
         if reasoning_content:
-            formatted_reasoning = (
-                format_reasoning_content(reasoning_content, self.reasoning_tag_name) + "\n\n"
+            formatted_reasoning = format_reasoning_content(
+                reasoning_content, self.reasoning_tag_name
             )
             show_resp = formatted_reasoning + show_resp
 
+        show_resp = replace_reasoning_tags(show_resp, self.reasoning_tag_name)
+
         self.io.assistant_output(show_resp, pretty=self.show_pretty())
 
         if (

aider/reasoning_tags.py

@@ -2,12 +2,15 @@
 
 import re
 
+from aider.dump import dump  # noqa
+
 # Standard tag identifier
 REASONING_TAG = "thinking-content-" + "7bbeb8e1441453ad999a0bbba8a46d4b"
 # Output formatting
 REASONING_START = "> Thinking ..."
 REASONING_END = "> ... done thinking.\n\n------"
 
+
 def replace_reasoning_tags(text, tag_name):
     """
     Replace opening and closing reasoning tags with standard formatting.
@@ -29,11 +32,9 @@ def replace_reasoning_tags(text, tag_name):
     # Replace closing tag with proper spacing
     text = re.sub(f"\\s*</{tag_name}>\\s*", f"\n\n{REASONING_END}\n\n", text)
 
-    # Clean up any excessive newlines (more than 2 consecutive)
-    text = re.sub(r"\n{3,}", "\n\n", text)
-    
     return text
 
+
 def format_reasoning_content(reasoning_content, tag_name):
     """
     Format reasoning content with appropriate tags.
@@ -49,18 +50,4 @@ def format_reasoning_content(reasoning_content, tag_name):
         return ""
 
     formatted = f"<{tag_name}>\n\n{reasoning_content}\n\n</{tag_name}>"
-    return replace_reasoning_tags(formatted, tag_name)
-
-def detect_reasoning_tag(text, tag_name):
-    """
-    Detect if text contains reasoning tags.
-    
-    Args:
-        text (str): The text to check
-        tag_name (str): The tag name to look for
-        
-    Returns:
-        bool: True if text contains reasoning tags
-    """
-    opening_pattern = f"<{tag_name}>"
-    return opening_pattern in text
+    return formatted