Updated tests and fixed grammar

mist-test/src/items/function_test.mist

@@ -1,60 +1,60 @@
 pub module function_test;
 
-fn void greet() {
+void greet() {
     let mut x = 1;
     x++;
 }
 
-pub fn void test_basic_function() {
+pub void test_basic_function() {
     greet();
 }
 
-fn i32 add(a i32, b i32) {
+i32 add(i32 a, i32 b) {
     a + b
 }
 
-pub fn void test_fn_params() {
+pub void test_fn_params() {
     assert_eq!(add(2, 3), 5);
 }
 
-pub fn i32 test_fn_return() {
+pub i32 test_fn_return() {
     42
 }
 
-pub fn i32 test_fn_early_return() {
+pub i32 test_fn_early_return() {
     return 100;
     0
 }
 
-pub fn i32 test_fn_mut_param(mut x i32) {
+pub i32 test_fn_mut_param(i32 mut x) {
     x = x + 10;
     x
 }
 
-pub fn void test_method_call() {
+pub void test_method_call() {
     let s = "hello";
     assert_eq!(s.len(), 5);
     assert_eq!(s.to_uppercase(), "HELLO");
 }
 
-fn i32 triple(x i32) {
+i32 triple(i32 x) {
     add(x, add(x, x))
 }
 
-pub fn void test_nested_fn_calls() {
+pub void test_nested_fn_calls() {
     assert_eq!(triple(5), 15);
 }
 
-fn i32 factorial(n i32) {
+i32 factorial(i32 n) {
     if n <= 1 { 1 }
     else { n * factorial(n - 1) }
 }
 
-pub fn void test_recursive_fn() {
+pub void test_recursive_fn() {
     assert_eq!(factorial(5), 120);
 }
 
-pub fn void run_tests() {
+pub void run_tests() {
     test_basic_function();
     test_fn_params();
     assert_eq!(test_fn_return(), 42);