message: Fix Doxygen formatting
diff: namespace caf {
  -/// Creates a new continuous stream source by instantiating the default
  -/// source implementation with `Driver. `The returned manager is not
  -/// connected to any slot and thus not stored by the actor automatically.
  +/// Creates a new continuous stream source by instantiating the default source
  +/// implementation with `Driver`. The returned manager is not connected to any
  +/// slot and thus not stored by the actor automatically.
  /// @param self Points to the hosting actor.
  /// @param init Function object for initializing the state of the source.
  /// @param pull Generator function object for producing downstream messages.
  @@ -50,9 +50,9 @@ attach_continuous_stream_source(scheduled_actor* self, Init init, Pull pull,
  return mgr;
  }
  -/// Creates a new continuous stream source by instantiating the default
  -/// source implementation with `Driver. `The returned manager is not
  -/// connected to any slot and thus not stored by the actor automatically.
  +/// Creates a new continuous stream source by instantiating the default source
  +/// implementation with `Driver`. The returned manager is not connected to any
  +/// slot and thus not stored by the actor automatically.
  /// @param self Points to the hosting actor.
  /// @param init Function object for initializing the state of the source.
  /// @param pull Generator function object for producing downstream messages.
  