cargo clippy cleanup

src/main.rs

@@ -1,5 +1,5 @@
 fn main() {
-    println!("");
+    println!();
 
     let strs = vec!["is2 Thi1s T4est 3a"];
 
@@ -7,7 +7,7 @@ fn main() {
         println!("{} -> {}", str, order(str));
     }
 
-    println!("");
+    println!();
 }
 
 fn order(sentence: &str) -> String {
@@ -16,15 +16,18 @@ fn order(sentence: &str) -> String {
 
     for word in sentence.split_whitespace() {
         let n = word.matches(char::is_numeric).collect::<Vec<&str>>()[0];
-        print!("{:?}\t{:?}\n", n, word);
+        println!("{:?}\t{:?}", n, word);
     }
-    println!("");
+    println!();
 
     words = sentence.split_ascii_whitespace()
         .map(|s| format!("{}{}", s.matches(char::is_numeric).collect::<Vec<&str>>()[0],s))
         .collect();
+
     words.sort();
 
-    words.iter().map(|w| w.trim_start_matches(char::is_numeric)).collect::<Vec<&str>>().join(" ")
+    words.iter().map(|w| &w[1..])
+        .collect::<Vec<&str>>()
+        .join(" ")
 
 }