Use the ? operator instead of the try! macro

[eaon]

In accordance with https://doc.rust-lang.org/std/macro.try.html

[vhdirk]

I didn't know ? was preferred. Thanks! Is your clippy config that strict?

[eaon]

No, I guess I just learned about the language in detail after ? hit stable. I wasn't sure what try! was doing and noticed that it's not preferred anymore. There is rust-lang/rust-clippy#1361 but as the last comment suggests, occasionally there seem to be problems.

Personally I try to stay with the "modern" way of doing things with stable releases, that's all ;)