chore: Alter whitespace for consistency

* Add newline after "I AM DONE" in exercises for consistency
* Remove trailing whitespace from exercises

exercises/conversions/as_ref_mut.rs

@@ -3,6 +3,7 @@
 // and https://doc.rust-lang.org/std/convert/trait.AsMut.html, respectively.
 
 // I AM NOT DONE
+
 // Obtain the number of bytes (not characters) in the given argument
 // Add the AsRef trait appropriately as a trait bound
 fn byte_counter<T>(arg: T) -> usize {

exercises/conversions/from_into.rs

@@ -18,7 +18,6 @@ impl Default for Person {
     }
 }
 
-// I AM NOT DONE
 // Your task is to complete this implementation
 // in order for the line `let p = Person::from("Mark,20")` to compile
 // Please note that you'll need to parse the age component into a `usize`
@@ -33,6 +32,9 @@ impl Default for Person {
 // 5. Extract the other element from the split operation and parse it into a `usize` as the age
 // If while parsing the age, something goes wrong, then return the default of Person
 // Otherwise, then return an instantiated Person object with the results
+
+// I AM NOT DONE
+
 impl From<&str> for Person {
     fn from(s: &str) -> Person {
     }

exercises/conversions/using_as.rs

@@ -1,9 +1,11 @@
 // Type casting in Rust is done via the usage of the `as` operator.
 // Please note that the `as` operator is not only used when type casting.
 // It also helps with renaming imports.
+//
+// The goal is to make sure that the division does not fail to compile
 
 // I AM NOT DONE
-// The goal is to make sure that the division does not fail to compile
+
 fn average(values: &[f64]) -> f64 {
     let total = values
         .iter()
@@ -14,4 +16,4 @@ fn average(values: &[f64]) -> f64 {
 fn main() {
     let values = [3.5, 0.3, 13.0, 11.7];
     println!("{}", average(&values));
-}
+}

exercises/generics/generics1.rs

@@ -1,4 +1,4 @@
-// This shopping list program isn't compiling! 
+// This shopping list program isn't compiling!
 // Use your knowledge of generics to fix it.
 
 // I AM NOT DONE

exercises/generics/generics2.rs

@@ -2,6 +2,7 @@
 // Rewrite it using generics so that it supports wrapping ANY type.
 
 // I AM NOT DONE
+
 struct Wrapper {
     value: u32
 }
@@ -18,11 +19,11 @@ mod tests {
 
     #[test]
     fn store_u32_in_wrapper() {
-        assert_eq!(Wrapper::new(42).value,  42);
+        assert_eq!(Wrapper::new(42).value, 42);
     }
 
     #[test]
     fn store_str_in_wrapper() {
         assert_eq!(Wrapper::new("Foo").value, "Foo");
     }
-}
+}

exercises/generics/generics3.rs

@@ -1,13 +1,14 @@
 // An imaginary magical school has a new report card generation system written in Rust!
-// Currently the system only supports creating report cards where the student's grade 
-// is represented numerically (e.g. 1.0 -> 5.5). 
-// However, the school also issues alphabetical grades (A+ -> F-) and needs 
+// Currently the system only supports creating report cards where the student's grade
+// is represented numerically (e.g. 1.0 -> 5.5).
+// However, the school also issues alphabetical grades (A+ -> F-) and needs
 // to be able to print both types of report card!
 
-// Make the necessary code changes to support alphabetical report cards, thereby making 
+// Make the necessary code changes to support alphabetical report cards, thereby making
 // the second test pass.
 
 // I AM NOT DONE
+
 pub struct ReportCard {
     pub grade: f32,
     pub student_name: String,
@@ -16,7 +17,7 @@ pub struct ReportCard {
 
 impl ReportCard {
     pub fn print(&self) -> String {
-        format!("{} ({}) - achieved a grade of {}", 
+        format!("{} ({}) - achieved a grade of {}",
             &self.student_name, &self.student_age, &self.grade)
     }
 }
@@ -28,8 +29,8 @@ mod tests {
     #[test]
     fn generate_numeric_report_card() {
         let report_card = ReportCard {
-            grade: 2.1, 
-            student_name: "Tom Wriggle".to_string(), 
+            grade: 2.1,
+            student_name: "Tom Wriggle".to_string(),
             student_age: 12,
         };
         assert_eq!(report_card.print(), "Tom Wriggle (12) - achieved a grade of 2.1");
@@ -39,10 +40,10 @@ mod tests {
     fn generate_alphabetic_report_card() {
         // TODO: Make sure to change the grade here after you finish the exercise.
         let report_card = ReportCard {
-            grade: 2.1, 
-            student_name: "Gary Plotter".to_string(), 
+            grade: 2.1,
+            student_name: "Gary Plotter".to_string(),
             student_age: 11,
         };
         assert_eq!(report_card.print(), "Gary Plotter (11) - achieved a grade of A+");
     }
-}
+}

exercises/primitive_types/primitive_types3.rs

@@ -1,5 +1,5 @@
 // primitive_types3.rs
-// Create an array with at least 100 elements in it where the ??? is. 
+// Create an array with at least 100 elements in it where the ??? is.
 // Execute `rustlings hint primitive_types3` for hints!
 
 // I AM NOT DONE

exercises/structs/structs3.rs

@@ -47,7 +47,7 @@ mod tests {
     fn create_international_package() {
         let sender_country = String::from("Spain");
         let recipient_country = String::from("Russia");
-        
+
         let package = Package::new(sender_country, recipient_country, 1200);
 
         assert!(package.is_international());
@@ -59,9 +59,9 @@ mod tests {
         let recipient_country = String::from("Spain");
 
         let cents_per_kg = ???;
-        
+
         let package = Package::new(sender_country, recipient_country, 1500);
-        
+
         assert_eq!(package.get_fees(cents_per_kg), 4500);
     }
 }

exercises/traits/traits1.rs

@@ -1,21 +1,21 @@
 // traits1.rs
 // Time to implement some traits!
-// 
+//
 // Your task is to implement the trait
 // `AppendBar' for the type `String'.
-// 
+//
 // The trait AppendBar has only one function,
 // which appends "Bar" to any object
 // implementing this trait.
 
 // I AM NOT DONE
+
 trait AppendBar {
     fn append_bar(self) -> Self;
 }
 
 impl AppendBar for String {
     //Add your code here
-
 }
 
 fn main() {
@@ -40,5 +40,4 @@ mod tests {
             String::from("BarBar")
         );
     }
-
-}
+}

exercises/traits/traits2.rs

@@ -1,12 +1,12 @@
 // traits2.rs
-// 
+//
 // Your task is to implement the trait
 // `AppendBar' for a vector of strings.
-// 
+//
 // To implement this trait, consider for
 // a moment what it means to 'append "Bar"'
 // to a vector of strings.
-// 
+//
 // No boiler plate code this time,
 // you can do this!
 
@@ -31,5 +31,4 @@ mod tests {
         assert_eq!(foo.pop().unwrap(), String::from("Bar"));
         assert_eq!(foo.pop().unwrap(), String::from("Foo"));
     }
-
 }