add comma

Author: chrisj

src/ui/url_hash_binding.ts

@@ -129,7 +129,7 @@ export class UrlHashBinding extends RefCounted {
       if (stateString !== this.prevStateString) {
         this.prevStateString = stateString;
         const userFunc = this.viewer.urlHashRateLimit.value;
-        const safeFunc = /^[xelogmaxin */\+\-\d\(\)]*$/;
+        const safeFunc = /^[xelogmaxin ,*/\+\-\d\(\)]*$/;
         if (safeFunc.test(userFunc)) {
           const translatedFunc = userFunc
             .replaceAll("log", "Math.log")