🦀 update sums/ rust examples

Author: cratelyn

sums/sum2.rs

@@ -1,6 +1,4 @@
 fn main() {
-    println!(
-        "{}",
-        (1..=100).fold(0, |cum, cur| cum + cur)
-    );
+    let sum = (1..=100).fold(0, std::ops::Add::add);
+    println!("{sum}");
 }

sums/sum3.rs

@@ -1,6 +1,4 @@
 fn main() {
-    println!(
-        "{}",
-        (1..=100).sum::<u32>(),
-    );
+    let sum: u32 = (1..=100).sum();
+    println!("{sum}");
 }