style: cargo fmt sweep under rustc 1.97.1 (toolchain reformat, no semantic change)

benches/switch_cost.rs

@@ -73,7 +73,10 @@ fn variant() -> &'static str {
 }
 
 fn env_usize(key: &str, default: usize) -> usize {
-    std::env::var(key).ok().and_then(|v| v.parse().ok()).unwrap_or(default)
+    std::env::var(key)
+        .ok()
+        .and_then(|v| v.parse().ok())
+        .unwrap_or(default)
 }
 
 // --------------------------------------------------------------------------
@@ -226,7 +229,11 @@ fn main() {
     let mean_cyc = pooled_cyc.iter().map(|&v| v as f64).sum::<f64>() / n.max(1) as f64;
     // Derived effective frequency: cycles per ns = GHz. Cross-checks the two
     // lenses against the box's known base clock.
-    let derived_ghz = if mean_ns > 0.0 { mean_cyc / mean_ns } else { 0.0 };
+    let derived_ghz = if mean_ns > 0.0 {
+        mean_cyc / mean_ns
+    } else {
+        0.0
+    };
 
     let p50 = pct(&pooled_ns, 50.0);
     let p90 = pct(&pooled_ns, 90.0);
@@ -241,8 +248,14 @@ fn main() {
         "  rounds={} warmup={} runs={}  (instrumentation floor: {} ns / {} cyc, subtracted)",
         rounds, warmup, runs, floor_ns, floor_cyc
     );
-    println!("  {:<10} {:<10} {:<10} {:<10} {:<10}", "p50 ns", "p90 ns", "p99 ns", "min ns", "max ns");
-    println!("  {:<10} {:<10} {:<10} {:<10} {:<10}", p50, p90, p99, lo, hi);
+    println!(
+        "  {:<10} {:<10} {:<10} {:<10} {:<10}",
+        "p50 ns", "p90 ns", "p99 ns", "min ns", "max ns"
+    );
+    println!(
+        "  {:<10} {:<10} {:<10} {:<10} {:<10}",
+        p50, p90, p99, lo, hi
+    );
     println!(
         "  mean {:.1} ns | mean {:.0} cyc | derived {:.3} GHz",
         mean_ns, mean_cyc, derived_ghz
@@ -251,6 +264,18 @@ fn main() {
     // Greppable line — same spirit as SPINCSV.
     println!(
         "SWITCHCSV,{},{},{},{},{},{},{},{},{},{},{:.1},{:.0},{:.3}",
-        variant(), mode, rounds, runs, n, p50, p90, p99, lo, hi, mean_ns, mean_cyc, derived_ghz
+        variant(),
+        mode,
+        rounds,
+        runs,
+        n,
+        p50,
+        p90,
+        p99,
+        lo,
+        hi,
+        mean_ns,
+        mean_cyc,
+        derived_ghz
     );
 }