Fix typo in comment

diff --git a/includes/libs/CSSMin.php b/includes/libs/CSSMin.php
index bdb6008..af45042 100644 (file)
--- a/includes/libs/CSSMin.php
+++ b/includes/libs/CSSMin.php
@@ -121,7 +121,7 @@ class CSSMin {
                                        // this used to be how you get the mime-type of a file
                                        $type = mime_content_type( $file );
                                } else {
-                                       // Worst-case scenario has happend,
+                                       // Worst-case scenario has happened,
                                        // use the file extension to infer the mime-type
                                        $ext = strtolower( pathinfo( $file, PATHINFO_EXTENSION ) );
                                        if ( isset( self::$mimeTypes[$ext] ) ) {