Migrate the main crate to the 2018 edition. #2247
Merged
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Note that this does not make any idiom adjustments, nor does it make the
crate usable without
#[macro_use] extern crate diesel;
. This is theresult of running
cargo fix --edition
, fixing the broken code itgenerated, and then manually fixing the doctests.
As part of this I noticed a few doctests that expected the
extras
feature to be able to run. I fixed those, and also realized that the
Macaddr
type's impls are hidden behind thenetwork-address
featurefor no real reason.