Fix indentation

Author: g3xzh

src/libextra/stats.rs

@@ -1117,8 +1117,8 @@ mod tests {
     fn test_sum_overflow_f64() {
         let n = f64::MAX_VALUE;
         println!("{} ", [n, -n, n, n / 10.0].sum());
-	println!("{} ", [n, -n, n, 0.1 * n].sum());
-	error!("n {} ; sum {}", n, [n, -n, n, n / 10.0].sum())
+        println!("{} ", [n, -n, n, 0.1 * n].sum());
+        error!("n {} ; sum {}", n, [n, -n, n, n / 10.0].sum())
     }
 }