deletions | additions       diff --git a/panel_test.html b/panel_test.html  index d137087..48840e0 100644  --- a/panel_test.html  +++ b/panel_test.html 
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  d3.selectAll("body button").data(states)  .enter().append("button")  .html(function(d, i){ return d['name']; })  .on("click", function(e,i) {  update_state(states[i]);  }); });    function update_state(state) {