Add missing semicolons

exercises/03_if/if3.rs

@@ -34,21 +34,21 @@ mod tests {
 
     #[test]
     fn gopher_lives_in_burrow() {
-        assert_eq!(animal_habitat("gopher"), "Burrow")
+        assert_eq!(animal_habitat("gopher"), "Burrow");
     }
 
     #[test]
     fn snake_lives_in_desert() {
-        assert_eq!(animal_habitat("snake"), "Desert")
+        assert_eq!(animal_habitat("snake"), "Desert");
     }
 
     #[test]
     fn crab_lives_on_beach() {
-        assert_eq!(animal_habitat("crab"), "Beach")
+        assert_eq!(animal_habitat("crab"), "Beach");
     }
 
     #[test]
     fn unknown_animal() {
-        assert_eq!(animal_habitat("dinosaur"), "Unknown")
+        assert_eq!(animal_habitat("dinosaur"), "Unknown");
     }
 }