diff --git a/smtp.go b/smtp.go
index 84fe2d4..d8bca14 100644
--- a/smtp.go
+++ b/smtp.go
@@ -4,15 +4,17 @@
 
 // Package smtp implements the Simple Mail Transfer Protocol as defined in RFC 5321.
 // It also implements the following extensions:
+//
 //	8BITMIME  RFC 1652
 //	AUTH      RFC 2554
 //	STARTTLS  RFC 3207
+//
 // Additional extensions may be handled by clients.
 //
 // The smtp package is frozen and is not accepting new features.
 // Some external packages provide more functionality. See:
 //
-//   https://godoc.org/?q=smtp
+//	https://godoc.org/?q=smtp
 package main
 
 import (