chore: Run rustfmt on exercises

exercises/generics/generics1.rs

@@ -7,4 +7,3 @@ fn main() {
     let mut shopping_list: Vec<?> = Vec::new();
     shopping_list.push("milk");
 }
-

exercises/generics/generics2.rs

@@ -4,7 +4,7 @@
 // I AM NOT DONE
 
 struct Wrapper {
-    value: u32
+    value: u32,
 }
 
 impl Wrapper {

exercises/generics/generics3.rs

@@ -33,7 +33,10 @@ mod tests {
             student_name: "Tom Wriggle".to_string(),
             student_age: 12,
         };
-        assert_eq!(report_card.print(), "Tom Wriggle (12) - achieved a grade of 2.1");
+        assert_eq!(
+            report_card.print(),
+            "Tom Wriggle (12) - achieved a grade of 2.1"
+        );
     }
 
     #[test]
@@ -44,6 +47,9 @@ mod tests {
             student_name: "Gary Plotter".to_string(),
             student_age: 11,
         };
-        assert_eq!(report_card.print(), "Gary Plotter (11) - achieved a grade of A+");
+        assert_eq!(
+            report_card.print(),
+            "Gary Plotter (11) - achieved a grade of A+"
+        );
     }
 }