Fix a false negative for Layout/EmptyComment

This PR fixes a false negative for `Layout/EmptyComment`
when using an empty comment next to code after comment line.

changelog/fix_false_negative_for_layout_empty_comment.md

@@ -0,0 +1 @@
+* [#12914](https://github.com/rubocop/rubocop/pull/12914): Fix a false negative for `Layout/EmptyComment` when using an empty comment next to code after comment line. ([@koic][])

lib/rubocop/cop/layout/empty_comment.rb

@@ -106,7 +106,9 @@ def autocorrect(corrector, node)
         end
 
         def concat_consecutive_comments(comments)
-          consecutive_comments = comments.chunk_while { |i, j| i.loc.line.succ == j.loc.line }
+          consecutive_comments = comments.chunk_while do |i, j|
+            i.loc.line.succ == j.loc.line && i.loc.column == j.loc.column
+          end
 
           consecutive_comments.map do |chunk|
             joined_text = chunk.map { |c| comment_text(c) }.join

spec/rubocop/cop/layout/empty_comment_spec.rb

@@ -38,6 +38,23 @@ def foo
     RUBY
   end
 
+  it 'registers an offense and corrects when using an empty comment next to code after comment line' do
+    expect_offense(<<~RUBY)
+      # comment
+      def foo #
+              ^ Source code comment is empty.
+        something
+      end
+    RUBY
+
+    expect_correction(<<~RUBY)
+      # comment
+      def foo
+        something
+      end
+    RUBY
+  end
+
   it 'does not register an offense when using comment text' do
     expect_no_offenses(<<~RUBY)
       # Description of `Foo` class.