I am the *very* last person to criticize another's use of the English language...but the text of that student newspaper article (opinion piece) gives no actual sources and contains no actual citations to support the headline's assertion that the 321LR will replace the 757 in Delta's fleet.
While I think it is easy to draw that conclusion to any semi-interested observer...the content/headline disconnect makes it seem like intended clickbait.
But the author tells us the 321LR has an "extra fuel take" going for it, which is nice.