halberom

The problem:

I wanted to use the jinja 'map' filter to modify each item in a string, in this simple 
example, adding '.conf' to each item.

The 'format' filter in jinja takes arguments (value, *args, **kwargs).  Unfortunately, 
it uses 'value' as the pattern. When called inside map 'value' is the current item in 
the list, or in other words *args as far as format is concerned. So it's the wrong way 
around.