[Plugin: Live Comment Preview] bug in version 2.0b1

Here’s one bug in Live Comment Preview version 2.0b1.

I was just looking at the code and on line 149 it says:

var allowedtags=['<?= implode("', '", array_keys($allowedtags)) ?>'];

Short open tags will not work on any server with that PHP option turned off.
https://codex.www.ads-software.com/WordPress_Coding_Standards#No_Shorthand_PHP_tags