add expected got

Author: rahxephon89

third_party/move/move-compiler-v2/tests/checking/typing/v1-naming/vector_literal_type_arity.exp

@@ -1,12 +1,12 @@
 
 Diagnostics:
-error: wrong number of type arguments
+error: wrong number of type arguments (expected 1, got 0)
   ┌─ tests/checking/typing/v1-naming/vector_literal_type_arity.move:4:18
   │
 4 │         let v0 = vector<>[];
   │                  ^^^^^^
 
-error: wrong number of type arguments
+error: wrong number of type arguments (expected 1, got 2)
   ┌─ tests/checking/typing/v1-naming/vector_literal_type_arity.move:5:18
   │
 5 │         let v2 = vector<u64, bool>[0, false];

third_party/move/move-model/src/builder/exp_builder.rs

@@ -1153,7 +1153,7 @@ impl<'env, 'translator, 'module_translator> ExpTranslator<'env, 'translator, 'mo
                 let loc = self.to_loc(loc);
                 let elem_ty = if let Some(tys) = ty_opt {
                     if tys.len() != 1 {
-                        self.error(&loc, "wrong number of type arguments");
+                        self.error(&loc, &format!("wrong number of type arguments (expected 1, got {})", tys.len()));
                         Type::Error
                     } else {
                         self.translate_type(&tys[0])