Redundant IO check on loading phrase group

[XFFA.IR Bot]

In \XF\Language::loadPhraseGroup, there are redundant IO/kernel transitions;

PHP:

$file = $this->groupPath . "/l$this->id/$group.php";
if ($this->groupPath && file_exists($file) && is_readable($file))
{
   $this->phraseCache = array_merge($this->phraseCache, include($file));
   $this->groupsCached[$group] = true;
}
else
{
   $this->groupsCached[$group] = false;
}

This results in the strace...

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