String keys in for loops

[ism-ssw]

Related to #54 I am trying to do something similar with a for loop.

As an example if the for variable is a keyword this works

(render "{% for a in Amt %}{{a.attr.Ccy}}{{a.content.0}} {% endfor %}" 
    {:Amt [{:attr {"Ccy" "USD"}, :content ["0.010000000"]} 
           {:attr {"Ccy" "GBP"}, :content ["0.020000000"]}]})
 => "USD0.010000000 GBP0.020000000 "

However changing :Amt to "Amt" produces nothing

 (render "{% for a in Amt %}{{a.attr.Ccy}}{{a.content.0}} {% endfor %}" 
    {"Amt" [{:attr {"Ccy" "USD"}, :content ["0.010000000"]} 
            {:attr {"Ccy" "GBP"}, :content ["0.020000000"]}]})
=> ""

Should this be added as an enhancement to make processing consistent?

[yogthos]

I think that's reasonable. Since it already behaves this way in one place, it makes sense to have the same behavior in others. Would you be up for doing a pr for this one?