PR changed the setlike add method to return the value that was added to the setlike object instead of the object itself. Was that an accident?

[annevk]

Originally posted by @Liamolucko in #1138 (comment)

cc @tabatkins

[tabatkins]

I think it might have been an accident, yeah. I'll look into it.

[tabatkins]

Ok yup that was clearly a bug on my part. The old spec had add/delete defined in a combined algo, and branched on the operation to figure out what the return value is (the set for add, the value for delete). When I split them apart I must have mistakenly used the same code for each; I probably copy-pasted the algos.

I'll fix in a PR.