message: fix comment in optim.hpp
diff: @@ -73,7 +73,7 @@ public:
  /** @brief Getter for the optimized function.
  The optimized function is represented by Function interface, which requires derivatives to
  - implement the sole method calc(double*) to evaluate the function.
  + implement the calc(double*) and getDim() methods to evaluate the function.
  @return Smart-pointer to an object that implements Function interface - it represents the
  function that is being optimized. It can be empty, if no function was given so far.
  