Fix one README example that were broken by dart-lang/mockito@34b9fdc

Also sync the executable version of it with the README.

Fixes dart-lang/mockito#744

PiperOrigin-RevId: 623800048

pkgs/mockito/README.md

@@ -170,15 +170,17 @@ In most cases, both plain arguments and argument matchers can be passed into
 mock methods:
 
 ```dart
-// You can use plain arguments themselves
+// You can use `any`
+when(cat.eatFood(any)).thenReturn(false);
+
+// ... or plain arguments themselves
 when(cat.eatFood("fish")).thenReturn(true);
 
 // ... including collections
 when(cat.walk(["roof","tree"])).thenReturn(2);
 
 // ... or matchers
 when(cat.eatFood(argThat(startsWith("dry")))).thenReturn(false);
-when(cat.eatFood(any)).thenReturn(false);
 
 // ... or mix arguments with matchers
 when(cat.eatFood(argThat(startsWith("dry")), hungry: true)).thenReturn(true);

pkgs/mockito/example/example.dart

@@ -88,8 +88,11 @@ void main() {
   });
 
   test('Argument matchers', () {
-    // You can use plain arguments themselves
-    when(cat.eatFood('fish')).thenReturn(true);
+    // You can use `any`
+    when(cat.eatFood(any)).thenReturn(false);
+
+    // ... or plain arguments themselves
+    when(cat.eatFood("fish")).thenReturn(true);
 
     // ... including collections
     when(cat.walk(['roof', 'tree'])).thenReturn(2);