Make Metrics/BlockNesting aware of numbered parameter

This PR makes `Metrics/BlockNesting` aware of numbered parameter.

changelog/new_make_metrics_block_nesting_aware_of_numbered_parameter.md

@@ -0,0 +1 @@
+* [#11750](https://github.com/rubocop/rubocop/pull/11750): Make `Metrics/BlockNesting` aware of numbered parameter. ([@koic][])

lib/rubocop/cop/metrics/block_nesting.rb

@@ -44,7 +44,7 @@ def check_nesting_level(node, max, current_level)
         def consider_node?(node)
           return true if NESTING_BLOCKS.include?(node.type)
 
-          count_blocks? && node.block_type?
+          count_blocks? && (node.block_type? || node.numblock_type?)
         end
 
         def message(max)

spec/rubocop/cop/metrics/block_nesting_spec.rb

@@ -227,6 +227,30 @@
         end
       RUBY
     end
+
+    context 'when numbered parameter', :ruby27 do
+      it 'accepts nested multiline blocks' do
+        expect_no_offenses(<<~RUBY)
+          if a
+            if b
+              [1, 2].each do
+                puts _1
+              end
+            end
+          end
+        RUBY
+      end
+
+      it 'accepts nested inline blocks' do
+        expect_no_offenses(<<~RUBY)
+          if a
+            if b
+              [1, 2].each { puts _1 }
+            end
+          end
+        RUBY
+      end
+    end
   end
 
   context 'when CountBlocks is true' do
@@ -259,5 +283,35 @@
         RUBY
       end
     end
+
+    context 'when numbered parameter', :ruby27 do
+      context 'nested multiline block' do
+        it 'registers an offense' do
+          expect_offense(<<~RUBY)
+            if a
+              if b
+                [1, 2].each do
+                ^^^^^^^^^^^^^^ Avoid more than 2 levels of block nesting.
+                  puts _1
+                end
+              end
+            end
+          RUBY
+        end
+      end
+
+      context 'nested inline block' do
+        it 'registers an offense' do
+          expect_offense(<<~RUBY)
+            if a
+              if b
+                [1, 2].each { puts _1 }
+                ^^^^^^^^^^^^^^^^^^^^^^^ Avoid more than 2 levels of block nesting.
+              end
+            end
+          RUBY
+        end
+      end
+    end
   end
 end