If it’s 1.78, it’s likely opened up slightly from the 1.85, not cropped. Any extra information you’re getting would’ve been within the error tolerances of matted projection at the time.
From Blu-Ray.com:
A word about aspect ratios: One slightly controversial element of this 4K restoration (which also extends to the included Blu-ray disc*, as as well as Warner Bros.’ 2007 Blu-ray) is its 1.78:1 framing, which is very common for WB catalog releases theatrically framed at 1.85:1. In comparison to that older Blu-ray, this new remaster also appears slightly zoomed-in by a factor of less than 5%, but nothing of great interest is lost. Take all this with a grain of salt, obviously: many home video releases presented The Shining in unmatted 1.33:1, which often ruined some of its more claustrophobic compositions, while some fans have even argued for 1.66:1, AKA “European widescreen”. (The excellent Stanley Kubrick Archives squashes that argument, showing a handwritten Kubrick note explaining that his films are composed for 1.85:1 but protected for 1.33:1 TV broadcast.) So while it’s disappointing that The Shining doesn’t keep its theatrical aspect ratio, this seems to be a fair compromise; after all, 1.78:1 is the new television standard.