does anyone know wth this means
"In the original script, Marty's playing rock and roll at the dance caused a riot which had to be broken up by police. This, combined with Marty accidentally tipping Doc off to the "secret ingredient" that made the time machine work (Coca-Cola) caused history to change. When Marty got back to the 1980s, he found that it was now the 1950s conception of that decade, with air-cars and what-not (all invented by Doc Brown and running on Coca-Cola). Marty also discovers that rock and roll was never invented, and he dedicates himself to starting the delayed cultural revolution. Meanwhile, his dad digs out the newspaper from the day after the dance and sees his son in the picture of the riot. "

It's poorly worded and I have no clue what "1950s conception of that decade, with air-cars and what-not..." yadayada is supposed to mean