{%- comment -%}
    Inserts the position description of a person.
    
    Assumes that there is a variable "person" already defined.  
    It holds a key "position" and an associated value which is pasted here 
    verbatim.
    If the key is not present, an informative HTML comment will be inserted.
{%- endcomment -%}

{%- assign person = include.person -%}
{%- if person -%}
    {%- if person.position -%}
        <span class="position">
            {{ person.position }}
        </span>
    {%- else -%}
        <!-- 
            NOTE: team_card/position.html was included,
            but person.position was not defined 
        -->
    {%- endif -%}
{%- else -%}
    <!--
        WARNING: team_card/position.html was included, 
        but no person object was defined 
    -->
{%- endif -%}