[doc] fix typo in example_7 - remove []() (backport #509)
#510
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General
I've removed
[]()from the end here:using CallbackReturn = rclcpp_lifecycle::node_interfaces::LifecycleNodeInterface::CallbackReturn;[]()I don't think that's a valid C++ syntax (sorry, I'm a beginner in C++). Also, because the actual code doesn't have
[]()(This change can be backported to Humble & Iron)
This is an automatic backport of pull request #509 done by Mergify.