some improvements to syntax highlighter

source/Ox.js

@@ -3950,11 +3950,9 @@ Ox.repeat = function(val, num) {
     var ret;
     if (Ox.isArray(val)) {
         ret = [];
-        if (num >= 1) {
-            Ox.loop(num, function() {
-                ret = Ox.merge(ret, val);
-            });
-        }
+        num >= 1 && Ox.loop(num, function() {
+            ret = Ox.merge(ret, val);
+        });
     } else {
         ret = num >= 1 ? new Array(num + 1).join(val.toString()) : '';
     }
@@ -4463,10 +4461,6 @@ Ox.isRegExp <f> Tests if a value is a regular expression
 @*/
 
 Ox.isRegExp = function(val) {
-    /*
-    >>> Ox.isRegExp(/ /)
-    true
-    */
     return val instanceof RegExp;
 };