example: use %o formatter

Author: TooTallNate

examples/node/app.js

@@ -5,7 +5,7 @@ var debug = require('../../')('http')
 
 // fake app
 
-debug('booting %s', name);
+debug('booting %o', name);
 
 http.createServer(function(req, res){
   debug(req.method + ' ' + req.url);