introduce `functions` (#3360)

`var f = function() {};` => `function f() {}`

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/output.js b/lib/output.js
index 7f7e74df..4b1ae949 100644
--- a/lib/output.js
+++ b/lib/output.js
@@ -123,7 +123,7 @@ function OutputStream(options) {
         });
     } : function(str) {
         var s = "";
-        for (var i = 0, len = str.length; i < len; i++) {
+        for (var i = 0; i < str.length; i++) {
             if (is_surrogate_pair_head(str[i]) && !is_surrogate_pair_tail(str[i + 1])
                 || is_surrogate_pair_tail(str[i]) && !is_surrogate_pair_head(str[i - 1])) {
                 s += "\\u" + str.charCodeAt(i).toString(16);