diff --git a/manuscript/chapter-6.md b/manuscript/chapter-6.md
index 88c2b53..141aa71 100644
--- a/manuscript/chapter-6.md
+++ b/manuscript/chapter-6.md
@@ -409,7 +409,7 @@ function sendMail({ from, to, subject, text, html }) {
 }
 
 function deleteEmails() {
-  while(emails.length > 0) {
+  while (emails.length > 0) {
       emails.pop();
   }
 }