check_found_backward ("This is some foo foo text", "foo", flags, 17, 20, "foo");
check_found_backward ("This is some foo foo text", "Foo", flags, 17, 20, "foo");
check_found_backward ("This is some foo Foo text", "foo", flags, 17, 20, "Foo");
check_found_backward ("This is some \303\200 \303\240 text", "\303\240", flags, 15, 16, "\303\240");
check_found_backward ("This is some \303\200 \303\240 text", "\303\200", flags, 15, 16, "\303\240");
check_found_backward ("This is some foo foo text", "foo", flags, 17, 20, "foo");
check_found_backward ("This is some foo foo text", "Foo", flags, 17, 20, "foo");
check_found_backward ("This is some foo Foo text", "foo", flags, 17, 20, "Foo");
check_found_backward ("This is some \303\200 \303\240 text", "\303\240", flags, 15, 16, "\303\240");
check_found_backward ("This is some \303\200 \303\240 text", "\303\200", flags, 15, 16, "\303\240");