don't add comment node to the nodelist

lib/liquid/block_body.rb

@@ -58,6 +58,9 @@ module Liquid
             return yield tag_name, markup
           end
           new_tag = tag.parse(tag_name, markup, tokenizer, parse_context)
+
+          next if new_tag.is_a?(Comment)
+
           @blank &&= new_tag.blank?
           @nodelist << new_tag
         end
@@ -153,6 +156,9 @@ module Liquid
             return yield tag_name, markup
           end
           new_tag = tag.parse(tag_name, markup, tokenizer, parse_context)
+
+          next if new_tag.is_a?(Comment)
+
           @blank &&= new_tag.blank?
           @nodelist << new_tag
         when token.start_with?(VARSTART)

test/unit/block_unit_test.rb

@@ -49,8 +49,8 @@ class BlockUnitTest < Minitest::Test
 
   def test_with_block
     template = Liquid::Template.parse("  {% comment %} {% endcomment %} ")
-    assert_equal([String, Comment, String], block_types(template.root.nodelist))
+    assert_equal([String, String], block_types(template.root.nodelist))
-    assert_equal(3, template.root.nodelist.size)
+    assert_equal(2, template.root.nodelist.size)
   end
 
   private

test/unit/tags/comment_tag_unit_test.rb

@@ -199,4 +199,26 @@ class CommentTagUnitTest < Minitest::Test
       World!
     LIQUID
   end
+
+  def test_comment_tag_node_is_not_in_nodelist
+    template = Liquid::Template.parse(<<~LIQUID.chomp)
+      {% comment %}
+        {% if true %}
+        {% endif %}
+      {% endcomment %}
+    LIQUID
+
+    assert_equal(0, template.root.nodelist.size)
+
+    template = Liquid::Template.parse(<<~LIQUID.chomp)
+      {% liquid
+        comment
+          if true
+          endif
+        endcomment
+      %}
+    LIQUID
+
+    assert_equal(0, template.root.nodelist.size)
+  end
 end

test/unit/template_unit_test.rb

@@ -7,13 +7,13 @@ class TemplateUnitTest < Minitest::Test
 
   def test_sets_default_localization_in_document
     t = Template.new
-    t.parse('{%comment%}{%endcomment%}')
+    t.parse('{%raw%}{%endraw%}')
     assert_instance_of(I18n, t.root.nodelist[0].options[:locale])
   end
 
   def test_sets_default_localization_in_context_with_quick_initialization
     t = Template.new
-    t.parse('{%comment%}{%endcomment%}', locale: I18n.new(fixture("en_locale.yml")))
+    t.parse('{%raw%}{%endraw%}', locale: I18n.new(fixture("en_locale.yml")))
 
     locale = t.root.nodelist[0].options[:locale]
     assert_instance_of(I18n, locale)