Updated tests and fixed grammar

mist-test/src/items/trait_test.mist

@@ -1,41 +1,41 @@
 pub module trait_test;
 
 trait Speak {
-    fn String speak(*self);
+    String speak(&self);
 }
 
 trait Greet : Speak {
-    fn String greet(*self);
+    String greet(&self);
 }
 
 struct Dog {
-    name String,
+    String name,
 }
 
 impl Speak for Dog {
-    fn String speak(*self) {
+    String speak(&self) {
         "woof".to_string()
     }
 }
 
 impl Greet for Dog {
-    fn String greet(*self) {
+    String greet(&self) {
         "hello".to_string()
     }
 }
 
-pub fn void test_trait_impl() {
+pub void test_trait_impl() {
     let d = Dog { name: "Rex".to_string() };
     assert_eq!(d.speak(), "woof");
 }
 
-pub fn void test_trait_with_requirement() {
+pub void test_trait_with_requirement() {
     let d = Dog { name: "Buddy".to_string() };
     assert_eq!(d.speak(), "woof");
     assert_eq!(d.greet(), "hello");
 }
 
-pub fn void run_tests() {
+pub void run_tests() {
     test_trait_impl();
     test_trait_with_requirement();
 }