message: Add a link to MatExpr in Detailed Description of Mat
diff: @@ -736,6 +736,8 @@ Finally, there are STL-style iterators that are smart enough to skip gaps betwee
  @endcode
  The matrix iterators are random-access iterators, so they can be passed to any STL algorithm,
  including std::sort().
  +
  +@note Matrix Expressions and arithmetic see MatExpr
  */
  class CV_EXPORTS Mat
  {
  