make code in random_quote.py a bit more beautiful

Author: aristidb

quotejson.py

@@ -12,3 +12,9 @@ def json(qs):
                 'quote': unicode(d['quote']),
                 })
     return simplejson.dumps(r)
+
+def single(q):
+    if q == None:
+        return '[]'
+    else:
+        return json([q])

random_quote.py

@@ -38,10 +38,7 @@ def get(self, **kwargs):
             q = None
 
         if json:
-            if q == None:
-                out = '[]'
-            else:
-                out = quotejson.json([q])
+            out = quotejson.single(q)
         else:
             out = render_template(
                 'cppbash/random_quote.html',