Support pub --with-prejudice.

sdk/lib/_internal/pub/test/pub_test.dart

Index: sdk/lib/_internal/pub/test/pub_test.dart
diff --git a/sdk/lib/_internal/pub/test/pub_test.dart b/sdk/lib/_internal/pub/test/pub_test.dart
index 585b3f4eca29f03c0f92ac9bb72199227911a1ea..3ac83ac5995c033732b264fa415d55fc7512b040 100644
--- a/sdk/lib/_internal/pub/test/pub_test.dart
+++ b/sdk/lib/_internal/pub/test/pub_test.dart
@@ -62,6 +62,10 @@ main() {
     schedulePub(args: ['-h'], output: USAGE_STRING);
   });
 
+  integration('running pub with --with-prejudice upcases everything', () {
+    schedulePub(args: ['--with-prejudice'], output: USAGE_STRING.toUpperCase());
+  });
+
   integration('running pub with --help after command shows command usage', () {
     schedulePub(args: ['get', '--help'],
         output: '''