Remove body attr_reader and initiliaze @body instance variable in parse method

lib/liquid/tags/doc.rb

@@ -30,15 +30,14 @@ module Liquid
   class Doc < Block
     NO_UNEXPECTED_ARGS = /\A\s*\z/
 
-    attr_reader :body
-
     def initialize(tag_name, markup, parse_context)
       super
-      @body = +""
       ensure_valid_markup(tag_name, markup, parse_context)
     end
 
     def parse(tokens)
+      @body = +""
+
       while (token = tokens.shift)
         tag_name = token =~ BlockBody::FullTokenPossiblyInvalid && Regexp.last_match(2)
 
@@ -64,7 +63,7 @@ module Liquid
     end
 
     def nodelist
-      []
+      [@body]
     end
 
     private

test/unit/tags/doc_tag_unit_test.rb

@@ -32,7 +32,7 @@ class DocTagUnitTest < Minitest::Test
       end
       .visit
 
-    assert_equal(doc_content, doc_tag.body)
+    assert_equal(doc_content, doc_tag.nodelist.first.to_s)
   end
 
   def test_doc_tag_does_not_support_extra_arguments
@@ -142,7 +142,7 @@ class DocTagUnitTest < Minitest::Test
       end
       .visit
 
-    assert_equal("{{ incomplete", doc_tag.body)
+    assert_equal("{{ incomplete", doc_tag.nodelist.first.to_s)
   end
 
   def test_doc_tag_preserves_error_line_numbers