Don't require ; to have space after in comments

asm.js

@@ -58,7 +58,8 @@ class Tokenizer {
         this.buffer.push(...src);
         let token;
         while (token = this.next()) {
-            if (token == this.comment_start)
+            if (token.string == undefined
+				&& token.startsWith(this.comment_start))
                 this.comment = true;
             else if (this.comment && token == LINE_END)
                 this.comment = false;