I also updated a lint issue in buffer.rs that was caught by nightly rustfmt. It's the same issue that was addressed in #2658 so I don't know how it got reverted.
There may be other lint issues that I will address as CI flags them (I hope not) as locally I am running into [this issue](https://github.com/rust-lang-nursery/rustfmt/issues/2916) after running `rustup update` cc @kszucs @sunchao @andygrove [ Full content available at: https://github.com/apache/arrow/pull/2700 ] This message was relayed via gitbox.apache.org for devnull@infra.apache.org
