fix: Add newline after push failure message

- Updated error output in push_changes() to include newlines after failure
- Improves readability of error messages in the terminal output
- Maintains consistency with successful push message formatting

merico/github/commit/commit.py

@@ -393,7 +393,7 @@ def push_changes():
         print("Push completed successfully.", end="\n\n", flush=True)
         return True
     except subprocess.CalledProcessError as e:
-        print(f"Push failed: {str(e)}", file=sys.stderr, flush=True)
+        print(f"Push failed: {str(e)}", end="\n\n", file=sys.stderr, flush=True)
         return False
 
 def main():