Issue2407750 Add missing call to urllib.quote

Patch supplied by cedric_krier. Reviewed and applied by
rouilj. "python run_tests.py -k 'not test_postgresql'" passed used for
validation. Ran a demo.py run with some simple tests to index page. I
don't have an explicit test to show that this patch fixes. However
given the name of the function patched this looks likehowit should
have been written originally.

Author: rouilj

roundup/cgi/templating.py

@@ -2695,7 +2695,8 @@ def indexargs_url(self, url, args):
         """
         q = urllib.quote
         sc = self.special_char
-        l = ['%s=%s'%(k,v) for k,v in args.items()]
+        l = ['%s=%s'%(k,isinstance(v, basestring) and q(v) or v)
+                for k,v in args.items()]
 
         # pull out the special values (prefixed by @ or :)
         specials = {}