String#b is Ruby 2.0.0 feature

Author: nurse

test/test_basic.rb

@@ -64,7 +64,7 @@ def test_github_issue_16
     ret = i.iconv("\xE3\x81\xBB\xE3\x81\x92")
     ret << i.iconv(nil)
     i.close
-    assert_equal "\x82\xD9\x82\xB0".b, ret
+    assert_equal "\x82\xD9\x82\xB0", ret
   rescue Iconv::InvalidEncoding
     # ignore if the iconv doesn't support SHIFT_JISX0213
   end