chore: Ensure copyright line is the first in the file (#19608)

The copyright checker was allowing files with code above the copyright
line in a few places, mainly as a result of IDEs ordering imports
improperly.

This makes the check more robust, and adds a whitelist of valid lines
that may appear before the copyright line.

1 files changed, 1 insertions, 1 deletions

diff --git a/ops/op2/dispatch_slow.rs b/ops/op2/dispatch_slow.rs
index f10217a2d..478f872cd 100644
--- a/ops/op2/dispatch_slow.rs
+++ b/ops/op2/dispatch_slow.rs
@@ -1,4 +1,3 @@
-use super::MacroConfig;
 // Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
 use super::generator_state::GeneratorState;
 use super::signature::Arg;
@@ -6,6 +5,7 @@ use super::signature::NumericArg;
 use super::signature::ParsedSignature;
 use super::signature::RetVal;
 use super::signature::Special;
+use super::MacroConfig;
 use super::V8MappingError;
 use proc_macro2::TokenStream;
 use quote::quote;