Rollup merge of rust-lang#125477 - nnethercote:missed-rustfmt, r=comp…

…iler-errors

Run rustfmt on files that need it.

Somehow these files aren't properly formatted. By default `x fmt` and `x tidy` only check files that have changed against master, so if an ill-formatted file somehow slips in it can stay that way as long as it doesn't get modified(?)

I found these when I ran `x fmt` explicitly on every `.rs` file in the repo, while working on
rust-lang/compiler-team#750.

test/src/bench.rs

@@ -98,7 +98,7 @@ fn fmt_thousands_sep(mut n: f64, sep: char) -> String {
                 (0, true) => write!(output, "{:06.2}", n / base as f64).unwrap(),
                 (0, false) => write!(output, "{:.2}", n / base as f64).unwrap(),
                 (_, true) => write!(output, "{:03}", n as usize / base).unwrap(),
-                _ => write!(output,  "{}", n as usize / base).unwrap()
+                _ => write!(output, "{}", n as usize / base).unwrap(),
             }
             if pow != 0 {
                 output.push(sep);