Changed 'in' to '==' to fix bug #258

common/lib/capa/capa/templates/choicegroup.html

@@ -17,7 +17,7 @@
 
         % for choice_id, choice_description in choices:
         <label for="input_${id}_${choice_id}"
-            % if input_type == 'radio' and choice_id in value:
+            % if input_type == 'radio' and choice_id == value:
             <% 
                 if status == 'correct':
                     correctness = 'correct'
@@ -32,7 +32,7 @@
             % endif
             >  
             <input type="${input_type}" name="input_${id}${name_array_suffix}" id="input_${id}_${choice_id}" value="${choice_id}"
-            % if choice_id in value:
+            % if choice_id == value:
             checked="true" 
             % endif