the first could be written:
//insert span around handle
res = ...
Here the function is nothing more than specifying a name, you can do this in a comment
If you just add a comment, you still have to skim past all the implementation details to figure out what the function is intending to do. With this example this, since it's such a small function this isn't too burdensome but if the implementation is more complex, then that's a lot of noise to sift through to determine what the function does.
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