-/* Use the checked formatting routine to ensure that the buffer
-does not overflow. Ensure there's space for a newline at the end. */
+/* Use the lengthchecked formatting routine to ensure that the buffer
+does not overflow. Ensure there's space for a newline at the end.
+However, use taint-unchecked routines for writing into the buffer
+so that we can write tainted info into the static debug_buffer -
+we trust that we will never expand the results. */