Error in docs about `Runnable::run` return value

[phil-opp]

The documentation for Runnable::run currently says:

https://github.com/stjepang/async-task/blob/7e1581aae0b94bbe50b65dc615c8d11d7010bbb3/src/runnable.rs#L278-L281

I think one of these trues should be a false, but I'm not sure which one.

Also, it is not clear how I should deal with the return value (i.e. should I do anything special if it returns true/false?).

[Deleted user]

I have fixed the typo and expanded the comment a bit. Let me know if you feel the latest docs are still not clear enough. Thanks!

[phil-opp]

Thanks a lot!