926
926
assert_equal(Encoding::US_ASCII, [1, [u]].join.encoding)
927
927
assert_equal(Encoding::UTF_8, [u, [e]].join.encoding)
928
928
assert_equal(Encoding::UTF_8, [u, [1]].join.encoding)
930
assert_equal(Encoding::US_ASCII, [[], u, nil].join.encoding, bug5379)
931
assert_equal(Encoding::UTF_8, [[], "\u3042", nil].join.encoding, bug5379)