bin/instrument_server in instrumental_tools-0.3.0 vs bin/instrument_server in instrumental_tools-0.3.1

@@ -165,10 +165,10 @@
       if previous_values
         data.each do |category, value|
           output["cpu.#{category}"] = value / total * 100
         end
       end
-      output["cpu.in_use"] = 100 - data['idle'] / total * 100
+      output["cpu.in_use"] = 100 - data[:idle] / total * 100
       output
     end
 
     def self.loadavg
       min_1, min_5, min_15 = `cat /proc/loadavg`.split(/\s+/)