Bug with case when structure

[fpierrat]

Hi,
I've looked for a couple of hours for a problem on my side, before finally being quite sure it's a bug.
After many tests I got on following simplified bug-reproducing-case:

{% assign v = '2' %}
{% assign t1 = 'one' %}
{% assign t2 = 'two' %}
{% assign t3 = 'more' %}

<br>if structure:
{% if v == '1'%}{{t1}}
{% elsif v == '2'%}{{t2}}
{% else %}{{t3}}
{% endif %}

<br>case structure:
{%case v %}
{% when '1' %}{{t1}}
{% when '2' %}{{t2}}
{% else %}{{t3}}
{% endcase %}

The output of this is:

if structure: two
case structure: ,two,

Where there's no reason for the commas before and after the output "two" text in the case syntax.
Thank in advanced for your help if I'm doing smthg wrong... or for a fix ;-)