rustfmt: Use use_try_shorthand default
rustfmt: Use use_try_shorthand default

Reviewed By: jsgf

Differential Revision: D21878162

fbshipit-source-id: b028673c0eb703984d24bf0d2983453fc2a8c212

voideanvalue/relay,josephsavona/relay,xuorig/relay,xuorig/relay,voideanvalue/relay,voideanvalue/relay,xuorig/relay,kassens/relay,voideanvalue/relay,atxwebs/relay,atxwebs/relay,kassens/relay,xuorig/relay,josephsavona/relay,kassens/relay,wincent/relay,josephsavona/relay,atxwebs/relay,xuorig/relay,kassens/relay,voideanvalue/relay,facebook/relay,wincent/relay,facebook/relay,facebook/relay,wincent/relay,wincent/relay,yungsters/relay,facebook/relay,yungsters/relay,voideanvalue/relay,kassens/relay,xuorig/relay,facebook/relay,facebook/relay,wincent/relay,wincent/relay,yungsters/relay,kassens/relay,atxwebs/relay