RUBY_SHOW_COPYRIGHT_TO_DIE: flip the default
Commit 7aab062ef3772c7e8e50fc872a1647918c76dbba says:
ruby_show_version() will no longer exits the process, if RUBY_SHOW_COPYRIGHT_TO_DIE is set to 0. This will be the default in the future.
3.0 is a good timing for that "future".
RUBY_SHOW_COPYRIGHT_TO_DIE: flip the default
Commit 7aab062ef3772c7e8e50fc872a1647918c76dbba says:
3.0 is a good timing for that "future".