build(deps-dev): bump the development-dependencies group with 3 updates (#3502)

Author: flavorjones

Gemfile

@@ -10,7 +10,7 @@ group :development do
   gem "rake", "13.2.1"
 
   # building extensions
-  gem "rake-compiler", "1.2.9"
+  gem "rake-compiler", "1.3.0"
   gem "rake-compiler-dock", "1.9.1"
 
   # parser generator
@@ -25,8 +25,8 @@ group :development do
 
   # rubocop
   unless RUBY_PLATFORM == "java"
-    gem "standard", "1.47.0"
-    gem "rubocop-minitest", "0.37.1"
+    gem "standard", "1.49.0"
+    gem "rubocop-minitest", "0.38.0"
     gem "rubocop-packaging", "0.6.0"
     gem "rubocop-rake", "0.7.1"
   end

lib/nokogiri/xml/document.rb

@@ -435,7 +435,7 @@ def fragment(tags = nil)
       undef_method :namespace_definitions, :line, :add_namespace
 
       def add_child(node_or_tags)
-        raise "A document may not have multiple root nodes." if (root && root.name != "nokogiri_text_wrapper") && !(node_or_tags.comment? || node_or_tags.processing_instruction?)
+        raise "A document may not have multiple root nodes." if root && root.name != "nokogiri_text_wrapper" && !(node_or_tags.comment? || node_or_tags.processing_instruction?)
 
         node_or_tags = coerce(node_or_tags)
         if node_or_tags.is_a?(XML::NodeSet)