diff --git a/bin/main.cpp b/bin/main.cpp
index a953135..a82cef6 100644
--- a/bin/main.cpp
+++ b/bin/main.cpp
@@ -56,6 +56,7 @@ auto main(int argc, char *argv[]) -> int
     hack::log()(l);
 
     // hack::range::save_to_file("/mnt/raid/projects/hack/hack/test.txt", v);
+    // hack::range::save_to_file("/mnt/raid/projects/hack/hack/test.txt", v, ":");
   }
 
   // math::max