Google is testing a vertical bar or vertical line next to the search results snippets when you hover your mouse over the snippet. Mordy Oberstein said this was spotted by Shay Harel, the Founder/CEO of RankRanger.
Here is his screen shot:
This seems familiar but I cannot find a story that I've written on this in my massive Google user interface changes list... I've seen similar things to this, but not this exactly.
This is a minor change but part of the 3,200 changes Google made in a year.
Here is the tweet:
Looks like Google is testing a "side highlight border" when you hover over a result's title....
— Mordy Oberstein (@MordyOberstein) September 11, 2019
Interesting.
via @RangerShay & @RankRanger
cc: @rustybrick #SERP pic.twitter.com/bjA43vCFlA
Forum discussion at Twitter.