Made stylistic changes to solutions

Author: BlueGhostAlt

src/dubstep.rs

@@ -7,5 +7,6 @@ pub fn song_decoder(song: &str) -> String {
     let original_words = original_non_empty_words.collect::<Vec<_>>();
 
     let original = original_words.join(" ");
+
     original
 }

src/regex_validate_pin_code.rs

@@ -1,5 +1,7 @@
+
 pub fn validate_pin(pin: &str) -> bool {
     let is_only_digits = pin.chars().all(|char| char.is_digit(10));
     let length = pin.len();
+
     is_only_digits && (length == 4 || length == 6)
 }

src/split_strings.rs

@@ -1,11 +1,14 @@
 pub fn solution(string: &str) -> Vec<String> {
     let chars = string.chars().collect::<Vec<_>>();
     let chunks = chars.chunks(2);
-    let chunks = chunks.map(|chunk| {
-        let chunk = chunk.iter().collect::<String>();
-        format!("{:_<2}", chunk)
-    });
-    let chunks = chunks.collect::<Vec<_>>();
+
+    let chunks = chunks
+        .map(|chunk| {
+            let chunk = chunk.iter().collect::<String>();
+
+            format!("{:_<2}", chunk)
+        })
+        .collect::<Vec<_>>();
 
     chunks
 }

src/two_to_one.rs

@@ -6,5 +6,6 @@ pub fn longest(a1: &str, a2: &str) -> String {
     chars.dedup();
 
     let chars = chars.iter().collect::<String>();
+
     chars
 }