* test/ripper/test_ripper.rb: fix squiggly heredoc identifier

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56270 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ripper/test_ripper.rb

@@ -110,7 +110,7 @@ class TestRipper::Ripper < Test::Unit::TestCase
 
     # lexing a squiggly heredoc triggers Ripper#dedent_string use
     src = <<-END
-puts <<~END
+puts <<~end
   hello
 end
     END