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

1 files changed, 9 insertions, 4 deletions

diff --git a/ops/optimizer.rs b/ops/optimizer.rs
index 2d68a296f..3f22a867b 100644
--- a/ops/optimizer.rs
+++ b/ops/optimizer.rs
@@ -1,10 +1,13 @@
-/// Optimizer for #[op]
-use crate::Op;
-use pmutil::{q, Quote};
-use proc_macro2::TokenStream;
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+//! Optimizer for #[op]
+
 use std::collections::BTreeMap;
 use std::fmt::Debug;
 use std::fmt::Formatter;
+
+use pmutil::{q, Quote};
+use proc_macro2::TokenStream;
+
 use syn::{
   parse_quote, punctuated::Punctuated, token::Colon2,
   AngleBracketedGenericArguments, FnArg, GenericArgument, PatType, Path,
@@ -12,6 +15,8 @@ use syn::{
   TypeReference, TypeSlice, TypeTuple,
 };
 
+use crate::Op;
+
 #[derive(Debug)]
 pub(crate) enum BailoutReason {
   // Recoverable errors