Fix rubocop offenses

lib/liquid/tokenizer.rb

@@ -153,7 +153,7 @@ module Liquid
         if name.start_with?("end")
           base = name.byteslice(3, name.bytesize - 3)
           stack = open_stacks[base]
-          if stack.length > 0
+          unless stack.empty?
             open_pos = stack.pop
             @has_matching_end_tag[open_pos] = true
           end

performance/unit/hybrid_render_benchmark.rb

@@ -151,7 +151,6 @@ Benchmark.ips do |x|
   x.config(time: 10, warmup: 5)
 
   TEMPLATES.each do |label, source|
-    begin
     Liquid::Template.parse(source, environment: env)
     x.report("parse: #{label}") do
       Liquid::Template.parse(source, environment: env)
@@ -159,7 +158,6 @@ Benchmark.ips do |x|
   rescue Liquid::SyntaxError => e
     puts "  Skipping '#{label}' - #{e.message}"
   end
-  end
 
   x.compare!
 end

test/unit/tokenizer_unit_test.rb

@@ -108,7 +108,7 @@ class TokenizerTest < Minitest::Test
 
   def test_matching_end_tag_handles_nested_same_name_tags
     tokenizer = new_tokenizer(
-      '{% render "a" %}{% render "b" %}inner{% endrender %}outer{% endrender %}'
+      '{% render "a" %}{% render "b" %}inner{% endrender %}outer{% endrender %}',
     )
     tokenizer.send(:shift) # {% render "a" %}
     # Should find the outer endrender (depth-aware), not the inner one
@@ -126,7 +126,7 @@ class TokenizerTest < Minitest::Test
   def test_matching_end_tag_returns_false_when_only_nested_end_tag
     # Only a nested endrender exists (consumed by the inner render), no outer endrender
     tokenizer = new_tokenizer(
-      '{% render "a" %}{% render "b" %}{% endrender %}'
+      '{% render "a" %}{% render "b" %}{% endrender %}',
     )
     tokenizer.send(:shift) # {% render "a" %}
     # The endrender belongs to the inner render (depth 1 -> 0), not the outer (depth 0)