diff --git a/src/exercise.rs b/src/exercise.rs
index 26995295..d8b55d8f 100644
--- a/src/exercise.rs
+++ b/src/exercise.rs
@@ -55,7 +55,7 @@ pub struct Exercise {
     // The hint text associated with the exercise
     pub hint: String,
     // The path of the next exercise
-    pub next_path: Option<PathBuf>
+    pub next_path: Option<PathBuf>,
 }
 
 // An enum to track of the state of an Exercise.
@@ -289,6 +289,7 @@ mod test {
             path: PathBuf::from("tests/fixture/state/pending_exercise.rs"),
             mode: Mode::Compile,
             hint: String::from(""),
+            next_path: None,
         };
         let compiled = exercise.compile().unwrap();
         drop(compiled);
@@ -320,6 +321,7 @@ mod test {
             path: PathBuf::from("tests/fixture/state/pending_exercise.rs"),
             mode: Mode::Compile,
             hint: String::new(),
+            next_path: None,
         };
 
         let state = exercise.state();
@@ -361,6 +363,7 @@ mod test {
             path: PathBuf::from("tests/fixture/state/finished_exercise.rs"),
             mode: Mode::Compile,
             hint: String::new(),
+            next_path: None,
         };
 
         assert_eq!(exercise.state(), State::Done);
@@ -373,6 +376,7 @@ mod test {
             path: PathBuf::from("tests/fixture/success/testSuccess.rs"),
             mode: Mode::Test,
             hint: String::new(),
+            next_path: None,
         };
         let out = exercise.compile().unwrap().run().unwrap();
         assert!(out.stdout.contains("THIS TEST TOO SHALL PASS"));
diff --git a/src/main.rs b/src/main.rs
index 83dbe006..e31488d4 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -247,9 +247,9 @@ fn main() {
     }
 }
 
-fn edit_exercises(exercises: &mut Vec<Exercise>){
+fn edit_exercises(exercises: &mut Vec<Exercise>) {
     let siz = exercises.len();
-    for i in 0.. siz {
+    for i in 0..siz {
         if i == siz - 1 {
             exercises[i].next_path = None;
             break;