/usr/share/ruby-build/2.1.6 is in ruby-build 20170726-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | install_package "openssl-1.0.2l" "https://www.openssl.org/source/openssl-1.0.2l.tar.gz#ce07195b659e75f4e1db43552860070061f156a98bb37b672b101ba6e3ddf30c" mac_openssl --if has_broken_mac_openssl
install_package "ruby-2.1.6" "https://cache.ruby-lang.org/pub/ruby/2.1/ruby-2.1.6.tar.bz2#7b5233be35a4a7fbd64923e42efb70b7bebd455d9d6f9d4001b3b3a6e0aa6ce9" warn_eol ldflags_dirs standard verify_openssl
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