Improved match statements

crates/parser/src/grammar.pest

@@ -450,7 +450,7 @@ loop_stmt = {
 pattern_list = { pattern ~ ("|" ~ pattern)* }
 
 match_item = {
-    pattern_list ~ "=>" ~ statement
+    pattern_list ~ "=>" ~ (statement | (expr ~ ","))
 }
 
 match_stmt = {

mist-test/src/common/statement_test.mist

@@ -109,8 +109,8 @@ pub void test_match_literal() {
 
     match x {
         1 => { result = 10; }
-        2 => { result = 20; }
+        2 => result = 20;
-        3 => { result = 30; }
+        3 => result = 30,
         _ => panic!();
     }
     assert_eq!(result, 20);