[ruby/yarp] Use binary for normalizing printed ASTs

https://github.com/ruby/yarp/commit/814326de34

test/yarp/parse_test.rb

@@ -21,6 +21,7 @@ class ParseTest < Test::Unit::TestCase
   # and the line breaks based on the length of the path.
   def normalize_printed(printed)
     printed
+      .b
       .gsub(
         /SourceFileNode \s*
           \(\s* (\d+\.\.\.\d+) \s*\) \s*