style: apply cargo fmt across workspace

src/io/single_instance.rs

@@ -27,9 +27,9 @@
 
 use std::io::{BufRead, BufReader, Write};
 use std::net::{Ipv4Addr, SocketAddr, TcpListener, TcpStream};
-use std::path::PathBuf;
 #[cfg(target_os = "macos")]
 use std::path::Path;
+use std::path::PathBuf;
 use std::sync::Mutex;
 use std::time::Duration;