The bundled (reference) implementation was of somewhat mixed quality and
it failed to follow standard in multiple places. This commit replaces
it with a new one, written from scratch to follow the standard as close
as possible.
* module/srfi/srfi-64/testing.scm: Delete file.
* module/srfi/srfi-64.scm: Replace with new implementation.
* am/bootstrap.am (srfi/srfi-64.go): Remove extra dependencies.
(NOCOMP_SOURCES): Remove srfi/srfi-64/testing.scm.
* test-suite/tests/srfi-64-test.scm
("8.6.1. Simple (form 1) test-apply")
("8.6.2. Simple (form 2) test-apply"): Adjust tests to follow the
specification.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>