Allow a trailing comment as a description comment for Bundler/GemComment

CHANGELOG.md

@@ -10,6 +10,7 @@
 
 * [#8508](https://github.com/rubocop-hq/rubocop/pull/8508): Fix a false positive for `Style/CaseLikeIf` when conditional contains comparison with a class. Mark `Style/CaseLikeIf` as not safe. ([@fatkodima][])
 * [#8534](https://github.com/rubocop-hq/rubocop/issues/8534): Fix `Lint/BinaryOperatorWithIdenticalOperands` for binary operators used as unary operators. ([@marcandre][])
+* [#8537](https://github.com/rubocop-hq/rubocop/pull/8537): Allow a trailing comment as a description comment for `Bundler/GemComment`. ([@pocke][])
 
 ### Changes
 

lib/rubocop/cop/bundler/gem_comment.rb

@@ -70,14 +70,18 @@ class GemComment < Cop
         def on_send(node)
           return unless gem_declaration?(node)
           return if ignored_gem?(node)
-          return if commented?(node)
+          return if commented_any_descendant?(node)
           return if cop_config[CHECKED_OPTIONS_CONFIG].any? && !checked_options_present?(node)
 
           add_offense(node)
         end
 
         private
 
+        def commented_any_descendant?(node)
+          commented?(node) || node.each_descendant.any? { |n| commented?(n) }
+        end
+
         def commented?(node)
           preceding_lines = preceding_lines(node)
           preceding_comment?(node, preceding_lines.last)
@@ -86,12 +90,12 @@ def commented?(node)
         # The args node1 & node2 may represent a RuboCop::AST::Node
         # or a Parser::Source::Comment. Both respond to #loc.
         def precede?(node1, node2)
-          node2.loc.line - node1.loc.line == 1
+          node2.loc.line - node1.loc.line <= 1
         end
 
         def preceding_lines(node)
           processed_source.ast_with_comments[node].select do |line|
-            line.loc.line < node.loc.line
+            line.loc.line <= node.loc.line
           end
         end
 

spec/rubocop/cop/bundler/gem_comment_spec.rb

@@ -33,6 +33,14 @@
       end
     end
 
+    context 'and the gem is commented on the same line' do
+      it 'does not register any offenses' do
+        expect_no_offenses(<<~RUBY, 'Gemfile')
+          gem 'rubocop' # Style-guide enforcer.
+        RUBY
+      end
+    end
+
     context 'and the gem is permitted' do
       it 'does not register any offenses' do
         expect_no_offenses(<<~RUBY, 'Gemfile')