The test file imports transducers module instead of srfi-171. I
suppose transducers is from Guile, so we're not really testing the
reference implementation.

The tests test "transduce" procedure, not defined in the ref.
implementation. I'm guessing this is list-transduce.

tindex is tested and exported, but not defined in the SRFI.

tcat is also mentioned in the SRFI and the test, probably should
renamed to tconcatenate. Same for tdedups -> delete-duplicates.

There are also tpartition-by and tpartition-all, used by the tests but
I don't know what these are in the SRFI.

171-impl.scm uses reverse!. As far as I can tell this is not part of
standard scheme. Not sure if it should mentioned in the "Sample
implementation" section.
--
Duy