/usr/lib/ruby/2.5.0/psych/versions.rb is in libruby2.5 2.5.1-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 | # frozen_string_literal: true
module Psych
# The version is Psych you're using
VERSION = '3.0.2'
if RUBY_ENGINE == 'jruby'
DEFAULT_SNAKEYAML_VERSION = '1.18'.freeze
end
end
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