chore: apply cargo fmt

Trailing whitespace cleanup after rebase conflict resolution.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: ewels

src/params.rs

@@ -1214,7 +1214,7 @@ mod tests {
         let err = p.validate().unwrap_err();
         assert!(err.to_string().contains("RG"));
     }
-    
+
     fn run_rng_seed_override() {
         let p = parse(&["--readFilesIn", "r.fq", "--runRNGseed", "42"]);
         assert_eq!(p.run_rng_seed, 42);