Include lib/rubocop/minitest/assert_offense.rb as a target for inspection

Since `RuboCop::Minitest::AssertOffense` module is a helper using Minitest's API,
it should be inspected under the `Minitest` department.

Author: koic

.rubocop.yml

@@ -12,6 +12,10 @@ AllCops:
   TargetRubyVersion: 2.7
   SuggestExtensions: false
 
+Minitest:
+  Include:
+    - lib/rubocop/minitest/assert_offense.rb
+
 InternalAffairs/NodeMatcherDirective:
   Enabled: false
 

lib/rubocop/minitest/assert_offense.rb

@@ -167,6 +167,7 @@ def assert_no_corrections
 
         # This is just here for a pretty diff if the source actually got changed
         new_source = @last_corrector.rewrite
+
         assert_equal(@processed_source.buffer.source, new_source)
 
         # There is an infinite loop if a corrector is present that did not make