How to fix content not being shown when using wordpress plugin : Prettify GC Syntax Highlighter ?

To fix the content now being shown when using the wordpress plugin : Prettify GC Syntax Highlighter , edit prettify-gc-syntax-highlighter.php and replace :

return preg_replace(
    "/<pre\\s*class\\s*=\\s*([\"'])\\s*prettyprint\\s*([^]*?)\\s*(.*?)<\/pre/ise", 
    "'<pre class='.stripslashes('$1').'prettyprint '.stripslashes('$2').''.htmlentities(stripslashes('$3')).'</pre'", 
    $text);

with

return preg_replace_callback(
    "/<pre\\s*class\\s*=\\s*([\"'])\\s*prettyprint\\s*([^]*?)\\s*
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