As the FSF advises, 'There is no legal significance to using the
three-character sequence “(C)”, but it does no harm.' It does take up
space though! For that reason, we remove it here from our C files.
* libguile/vm-engine.c (bind-kwargs):
* libguile/vm.c (vm_error_kwargs_missing_value):
* libguile/eval.c (error_missing_value)
(prepare_boot_closure_env_for_apply): Adapt to mirror VM behavior.
* libguile/keywords.c (scm_c_bind_keyword_arguments): Likewise.
* module/ice-9/eval.scm (primitive-eval): Update to error on (foo #:kw)
with a "Keyword argument has no value" instead of the horrible "odd
argument list length". Also adapts to the expected args format for
the keyword-argument-error exception printer in all cases. Matches
1.8 optargs behavior also.
* test-suite/standalone/test-scm-c-bind-keyword-arguments.c (test_missing_value):
(missing_value_error_handler): Update test.
* test-suite/tests/optargs.test: Add tests.
* libguile/keywords.c (scm_keyword_argument_error): New variable.
(scm_c_bind_keyword_arguments): New API function.
* libguile/keywords.h (enum scm_keyword_arguments_flags): New enum.
(scm_t_keyword_arguments_flags): New typedef.
(scm_c_bind_keyword_arguments): New prototype.
* doc/ref/api-data.texi (Coding With Keywords, Keyword Procedures): Add
documentation.
* test-suite/standalone/test-scm-c-bind-keyword-arguments.c: New file.
* test-suite/standalone/Makefile.am: Add
test-scm-c-bind-keyword-arguments test.
