Struct#inspect has ASCII encoding #2182
Description
On ruby 2.1 and 1.9:
irb(main):001:0> Struct.new(:a).new("ΆἅἇἈ").inspect
=> "#<struct a=\"ΆἅἇἈ\">"
irb(main):002:0> Struct.new(:a).new("ΆἅἇἈ").inspect.encoding
=> #<Encoding:UTF-8>On jruby 1.7.16:
irb(main):001:0> Struct.new(:a).new("ΆἅἇἈ").inspect
=> "#<struct a=\"\xCE\x86\xE1\xBC\x85\xE1\xBC\x87\xE1\xBC\x88\">"
irb(main):002:0> Struct.new(:a).new("ΆἅἇἈ").inspect.encoding
=> #<Encoding:ASCII-8BIT>