update example with full class path

Author: JBlond

example/cli.php

@@ -25,5 +25,7 @@
 // Generate a unified diff.
 // \jblond\Diff\Renderer\Text
 $renderer = new UnifiedCli();
+
+// jblond\cli\Cli
 $cli = new Cli();
 $cli->output($diff->render($renderer));