GlobalFunctions: Document the usage of wfUrlencode( null )

This was introduced for testing in 53b0052df.

Change-Id: I318d6d6c04334ea75fbc9ac1771fab9a9db8cb83

diff --git a/includes/GlobalFunctions.php b/includes/GlobalFunctions.php
index 319bf63..55b78ac 100644 (file)
--- a/includes/GlobalFunctions.php
+++ b/includes/GlobalFunctions.php
@@ -334,6 +334,7 @@ function wfUrlencode( $s ) {
        static $needle;
 
        if ( is_null( $s ) ) {
+               // Reset $needle for testing.
                $needle = null;
                return '';
        }