CSSMin: Add link to css-syntax spec for url tokens on w3.org

Change-Id: I9bfd7016ba4ec106e1b92602fd6d8188b8b183f3

diff --git a/includes/libs/CSSMin.php b/includes/libs/CSSMin.php
index 6b10ae4..4885ae6 100644 (file)
--- a/includes/libs/CSSMin.php
+++ b/includes/libs/CSSMin.php
@@ -163,6 +163,8 @@ class CSSMin {
         * Build a CSS 'url()' value for the given URL, quoting parentheses (and other funny characters)
         * and escaping quotes as necessary.
         *
+        * See http://www.w3.org/TR/css-syntax-3/#consume-a-url-token
+        *
         * @param string $url URL to process
         * @return string 'url()' value, usually just `"url($url)"`, quoted/escaped if necessary
         */