Make `*.ground-truth` files more human-readable

scripts/combine_tesseract_with_pero_ocr_docker.py

@@ -50,11 +50,11 @@ def main() -> None:
         if is_multicolumn(input_tesseract_filename.with_suffix('.hocr')):
             shutil.copy(input_tesseract_filename, output_filename)
             with decision_filename.open('wt') as f:
-                print('hocr', file=f)
+                print('tesseract', file=f)
         else:
             shutil.copy(input_pero_ocr_filename, output_filename)
             with decision_filename.open('wt') as f:
-                print('txt', file=f)
+                print('pero', file=f)
 
 
 if __name__ == '__main__':