Updated and revised some tests

tests/scripts/test_function_first_class_citizens.toy

@@ -0,0 +1,10 @@
+//check functions are first class citizens
+fn hello() {
+	print "Hello world";
+}
+
+fn ident(x) {
+	return x;
+}
+
+assert ident(hello) == hello, "First class function check failed";