Divorce lawyers often say their clients tell them they knew their marriage was over long before it hit the rocks. And for actor Christina Applegate, she knew she’d divorce Johnathon Schaech right from the beginning, all because of a tiny detail that gave her the “ick” right off the bat. In her new book, Applegate talks at length about her marriage to Schaech, which ended in divorce in 2007, and it’s a master class in following your gut, even if what it’s telling you couldn’t possibly come at a more inconvenient time. Christina Applegate knew her relationship with Johnathon Schaech wouldn’t last because of his shoes. Applegate told The New York Times she had previously decided to burn her journals. Instead, she decided to publish them in her new memoir, “You With the Sad Eyes.” In the book, she gets candid not just about her long film and TV career, which began when she was just one year old, but also her battles with beating cancer in 2008, being diagnosed with multiple sclerosis in 2021, …