diff --git a/aider/coders/base_coder.py b/aider/coders/base_coder.py
index cb30eed81..ad52b35dc 100755
--- a/aider/coders/base_coder.py
+++ b/aider/coders/base_coder.py
@@ -1013,7 +1013,7 @@ class Coder:
                 cache_hit_tokens = getattr(
                     completion.usage, "prompt_cache_hit_tokens", 0
                 ) or getattr(completion.usage, "cache_read_input_tokens", 0)
-                
+
                 def format_tokens(count):
                     if count < 1000:
                         return f"{count}"
@@ -1021,8 +1021,11 @@ class Coder:
                         return f"{count / 1000:.1f}k"
                     else:
                         return f"{round(count / 1000)}k"
-                
-                self.io.tool_output(f"Warmed {format_tokens(cache_hit_tokens)} cached tokens. ({i+1}/{self.num_cache_warming_pings})")
+
+                self.io.tool_output(
+                    f"Warmed {format_tokens(cache_hit_tokens)} cached tokens."
+                    f" ({i+1}/{self.num_cache_warming_pings})"
+                )
 
             self.io.tool_output("Stopped warming.")