Trailing whitespace remains when passing `--edition 2024`

[mmottl]

❯ rustfmt --version
rustfmt 1.8.0-stable (4d91de4e48 2025-02-17)

Consider the following file foo.rs:

fn f() {} // This has trailing whitespace  

The trailing whitespace remains when calling rustfmt --edition 2024 foo.rs but rustfmt foo.rs removes it.