[ruby/yarp] Better Node#pretty_print

Respect the current indentation

https://github.com/ruby/yarp/commit/068333ef49

lib/yarp.rb

@@ -307,7 +307,10 @@ module YARP
     end
 
     def pretty_print(q)
-      q.text(inspect.chomp)
+      q.seplist(inspect.chomp.each_line, -> { q.breakable }) do |line|
+        q.text(line.chomp)
+      end
+      q.current_group.break
     end
   end