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Ayush Das
194db6f5cb
Fix typos in tutorial documentation #29299 This PR fixes spelling typos across several tutorial documentation files (dnn, calib3d, objdetect, app, js_tutorials), including `export=dowload` -> `export=download` in the DNN text-spotting tutorial's Google Drive URLs. Documentation-only change; no functional code is affected. Pull Request Readiness Checklist: [x] I agree to contribute to the project under Apache 2 License. [x] To the best of my knowledge, the proposed patch is not based on code under GPL or another license that is incompatible with OpenCV. [x] The PR is proposed to the proper branch (4.x). [x] Documentation-only change; no accuracy/performance tests or opencv_extra patch are applicable.