Don't check flags attribute when JRuby parser is used

Ignore flags attribute when run specs against JRuby parser as far as YARP generates NEW LINE flag more accurate.
So YAML files contain correct NEW LINE flags and thus will fail on JRuby parser otherwise.

Author: andrykonchin

spec/truffle/parsing/parsing_spec.rb

@@ -49,6 +49,7 @@
 # So just replace AST in a YAML file using a regexp.
 
 overwrite = ENV['OVERWRITE_PARSING_RESULTS'] == 'true'
+original_parser = ENV['TRUFFLE_PARSING_USE_ORIGINAL_TRANSLATOR'] == 'true'
 
 describe "Parsing" do
   require 'yaml'
@@ -65,7 +66,7 @@
 
     guard -> { Primitive.vm_single_context? && !TruffleRuby.jit? } do
       it "a #{subject} (#{description.strip}) case is parsed correctly" do
-        if ENV['TRUFFLE_PARSING_USE_ORIGINAL_TRANSLATOR'] == 'true'
+        if original_parser
           actual_ast = Truffle::Debug.parse_and_dump_truffle_ast(source_code, focused_on_node, index).strip
         else
           actual_ast = Truffle::Debug.parse_with_yarp_and_dump_truffle_ast(source_code, focused_on_node, index).strip
@@ -88,6 +89,13 @@
           end
         else
           # actual test check
+
+          if original_parser
+            # ignore flags attribute generated by JRuby parser as far as it's not accurate
+            actual_ast.gsub!(/^\s+flags = \d+\n?/, "")
+            expected_ast.gsub!(/^\s+flags = \d+\n?/, "")
+          end
+
           unless actual_ast == expected_ast
             $stderr.puts "\nYARP AST:", Truffle::Debug.yarp_parse(source_code)
           end