diff --git a/tools/copyright.js b/tools/copyright.js
index 74952250..32208193 100644
--- a/tools/copyright.js
+++ b/tools/copyright.js
@@ -12,7 +12,7 @@ const SECTION_START = "AUTOGENERATED COPYRIGHT HEADER START";
 const SECTION_END = "AUTOGENERATED COPYRIGHT HEADER END";
 
 async function git_isIgnored(path) {
-    await new Promise((resolve, reject) => {
+    return await new Promise((resolve, reject) => {
         try {
             let proc = CHILD_PROCESS.spawn("git", [
                 "check-ignore",
@@ -36,11 +36,11 @@ async function git_isIgnored(path) {
     /* Sync alternative
     try {
         return CHILD_PROCESS.spawnSync("git", [
-            "check-ignore", 
+            "check-ignore",
             path
         ], {
-            "cwd": PROCESS.cwd(), 
-            "encoding": "utf8" 
+            "cwd": PROCESS.cwd(),
+            "encoding": "utf8"
         }).status == 0;
     } catch (ex) {
         return true;
@@ -249,7 +249,7 @@ async function addCopyright(file) {
         // Async/Promises
         let content = await FSPROMISES.readFile(file);
         let eol = (content.indexOf("\r\n") != -1 ? OS.EOL : "\n");
-        
+
         let copyright = await generateCopyright(file);
         let header = makeHeader(file, copyright);
         let insert = Buffer.from(header.join(eol) + eol);
@@ -258,7 +258,7 @@ async function addCopyright(file) {
         let startHeader = content.indexOf(SECTION_START);
         startHeader = content.lastIndexOf(eol, startHeader);
         startHeader += Buffer.from(eol).byteLength;
-        
+
         // Find the ending point.
         let endHeader = content.indexOf(SECTION_END);
         endHeader = content.indexOf(eol, endHeader);