Add more test for instance_expression

Author: eed3si9n

corpus/expressions.txt

@@ -432,8 +432,10 @@ class C {
     val c = new D(e, f)
     val e = new E:
       def app = 1
-    val f = new F {}
-    val g = new {
+    val f = new:
+      def app = 1
+    val g = new G {}
+    val i = new {
       "ok"
     }
     new Array: Array
@@ -460,6 +462,10 @@ class C {
              (identifier)
              (instance_expression (type_identifier) (template_body
                (function_definition (identifier) (integer_literal)))))
+          (val_definition
+             (identifier)
+             (instance_expression (template_body
+               (function_definition (identifier) (integer_literal)))))
           (val_definition
              (identifier)
              (instance_expression (type_identifier) (template_body)))