chore: add `copyright_checker` tool and add the missing copyright (#17285)

1 files changed, 8 insertions, 7 deletions

diff --git a/ext/flash/socket.rs b/ext/flash/socket.rs
index 8256be8a0..77881d536 100644
--- a/ext/flash/socket.rs
+++ b/ext/flash/socket.rs
@@ -1,12 +1,13 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
+use std::cell::UnsafeCell;
+use std::future::Future;
+use std::io::{Read, Write};
+use std::pin::Pin;
+use std::sync::{Arc, Mutex};
+
 use deno_core::error::AnyError;
 use mio::net::TcpStream;
-use std::{
-  cell::UnsafeCell,
-  future::Future,
-  io::{Read, Write},
-  pin::Pin,
-  sync::{Arc, Mutex},
-};
 use tokio::sync::mpsc;
 
 use crate::ParseStatus;