Refer readers to the discussion.

I'm doing this rather than officially sanctioning any value judgments
between implementations.

Author: arthurgleckler

contrib/README.org

@@ -1,15 +1,2 @@
 This directory contains implementations of SRFI 64 provided by people
-other than Per Bothner, the author of the SRFI.
-
-There are some differences between Per's sample implementation and
-Taylan's implementation:
-
-Per describes one advantage of his sample implementation:
-
-#+BEGIN_QUOTE
-One advantage of the reference implementation is that it has hooks for
-reporting line numbers for failing tests.  That seems impossibly to do
-portably, and difficult to do without some kind of macro hooks.
-#+END_QUOTE
-
-Taylan's implementation is mostly pure R7RS.
+other than Per Bothner, the author of the SRFI.

contrib/taylan.kammer/README.org

@@ -1,2 +1,7 @@
 This directory contains an implementation of SRFI 64 provided by
-Taylan Kammer.
+Taylan Kammer.
+
+There are some differences between Per's sample implementation and
+Taylan's implementation.  Rather than describing them here, I refer
+readers to the [[https://srfi-email.schemers.org/srfi-64/msg/13288855/][email discussion]] about the new implementation.  Both
+Per and Taylan contributed.