Added translation to result percentage

Author: SZonkil

oioioi/programs/handlers.py

@@ -698,6 +698,6 @@ def add_result_percentage(env, **kwargs):
         if (test_result['result_percentage'] == 100
                 or test_result['result_percentage'] == 0):
             continue
-        test_result['result_string'] = str(test_result['result_percentage']) + '% ― ' + \
-            ' ' + test_result['result_string']
+        test_result['result_string'] = _("Granted %d%% points, comment") % test_result['result_percentage'] + \
+                                       ': ' + test_result['result_string']
     return env