message: Minor doc update.
diff: @@ -35,13 +35,13 @@ bool updateGripperState(const franka::Gripper& gripper, franka::GripperState* st
  *
  * @param[in] gripper A pointer to a franka gripper
  * @param[in] default_speed The default speed for a gripper action
  - * @param[in] epsilon The epsilon window of the grasp.
  + * @param[in] grasp_epsilon The epsilon window of the grasp.
  * @param[in] action_server A pointer to a gripper action server
  * @param[in] goal A gripper action goal
  */
  void gripperCommandExecuteCallback(
  const franka::Gripper& gripper,
  - const GraspEpsilon& epsilon,
  + const GraspEpsilon& grasp_epsilon,
  double default_speed,
  actionlib::SimpleActionServer<control_msgs::GripperCommandAction>* action_server,
  const control_msgs::GripperCommandGoalConstPtr& goal);
  