Extend tests on `--help' and `--version' options. * tests/help.test: Create a new empty directory and chdir into it, rather than removing already present files. Run the aclocal and automake wrapper scripts directly, instead of relying on $AUTOMAKE and $ACLOCAL. Be sure to correctly match literal dots in aclocal's and automake's stderr. Add a trailing `:' command. * tests/help2.test: New test, checking that options `--help' and `--version' works in directories with broken `configure.in'. * tests/help3.test: New test, checking that options `--help' and `--version' take precedence on the other options. * tests/help4.test: New test, checking that the first among the `--help' and `--version' options to be specified on the command line wins. * tests/Makefile.am (TESTS): Updated.