Merge pull request #23341 from TuNanTang:3.4

### Pull Request Readiness Checklist

See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request

- [x] I agree to contribute to the project under Apache 2 License.
- [ ] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
- [ ] The PR is proposed to the proper branch
- [ ] There is a reference to the original bug report and related work
- [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
      Patch to opencv_extra has the same branch name.
- [ ] The feature is well documented and sample code can be built with the project CMake

samples/cpp/tutorial_code/core/mat_mask_operations/mat_mask_operations.cpp

@@ -92,7 +92,7 @@ void Sharpen(const Mat& myImage,Mat& Result)
 
         for(int i= nChannels;i < nChannels*(myImage.cols-1); ++i)
         {
-            *output++ = saturate_cast<uchar>(5*current[i]
+            output[i] = saturate_cast<uchar>(5*current[i]
                          -current[i-nChannels] - current[i+nChannels] - previous[i] - next[i]);
         }
     }