[Fix rubocop#7186] Fix a false positive for Style/MixinUsage

Fixes rubocop#7186.

This PR fixes a false positive for `Style/MixinUsage` when using inside
multiline block and `if` condition is after `include`.

And this PR is a additional patch of rubocop#7000.

CHANGELOG.md

@@ -10,6 +10,7 @@
 ### Bug fixes
 
 * [#7170](https://github.com/rubocop-hq/rubocop/issues/7170): Fix a false positive for `Layout/RescueEnsureAlignment` when def line is preceded with `private_class_method`. ([@tatsuyafw][])
+* [#7186](https://github.com/rubocop-hq/rubocop/issues/7186): Fix a false positive for `Style/MixinUsage` when using inside multiline block and `if` condition is after `include`. ([@koic][])
 
 ### Changes
 

lib/rubocop/ast/node/mixin/method_dispatch_node.rb

@@ -222,11 +222,22 @@ def binary_operation?
 
       def_node_matcher :macro_scope?, <<~PATTERN
         {^{({sclass class module block} ...) class_constructor?}
-         ^^{({sclass class module block} ... ({begin if} ...)) class_constructor?}
+         ^^#ascend_macro_scope?
          ^#macro_kwbegin_wrapper?
          #root_node?}
       PATTERN
 
+      def_node_matcher :wrapped_macro_scope?, <<~PATTERN
+        {({sclass class module block} ... ({begin if} ...)) class_constructor?}
+      PATTERN
+
+      def ascend_macro_scope?(ancestor)
+        return true if wrapped_macro_scope?(ancestor)
+        return false if root_node?(ancestor)
+
+        ascend_macro_scope?(ancestor.parent)
+      end
+
       # Check if a node's parent is a kwbegin wrapper within a macro scope
       #
       # @param parent [Node] parent of the node being checked

spec/rubocop/cop/style/mixin_usage_spec.rb

@@ -66,7 +66,8 @@ class C
        'and `if` condition is after `include`' do
       expect_no_offenses(<<~RUBY)
         klass.class_eval do
-          include M if defined?(M)
+          include M1
+          include M2 if defined?(M)
         end
       RUBY
     end