Rico pointed out that the testsuite failed on his system (dash
represented /bin/sh). Turns out that 'shift' in dash exits shell
with exit status 2 when there are no items in the array.
The other issue was that 'test-option-parser.sh' did not
re-executed the test in proper shell, but in /bin/sh.
* gl/tests/test-option-parser-helper (test_parse_eat_test): Don't
shift for empty $@.
* gl/tests/test-option-parser.sh: Use $__GL_ALL_SHELLS_SHELL as
shell which runs the helper.
* gl/build-aux/options-parser (func_parse_options): Put the info
message 'enabling shell trace mode' on stderr.
* gl/modules/options-parser-tests: New test module.
* gl/tests/test-option-parser.sh: New test-case.
* gl/tests/test-option-parser-helper: New test-case helper.
* bootstrap: Sync with option-parser.
* gl/modules/funclib.sh-tests: New test module.
* gl/modules/all-shells-tests: New test (helper) module.
* gl/tests/test-funclib-quote.sh: New test case.
* gl/tests/test-all-shells.sh: New gl test helper.
* cfg.mk (sc_useless_braces_in_variable_derefs): Whitelist
new test-funclib-quote.sh as the pattern is used there
intentionally.
(sc_space_tab): Likewise.
(sc_useless_braces_in_variable_derefs): Remove /cvsu pattern as
the file is not used with git.
(sc_prohibit_command_in_subst): New checker.
