Update chndb.jsonnet

Author: HaiwangYu

cfg/pgrapher/experiment/uboone/chndb.jsonnet

@@ -11,7 +11,7 @@ function(params, tools)
     wct: function(epoch="before") {
         type: "OmniChannelNoiseDB",
         name: "ocndb%s"%epoch,
-        data : {dft: wc.tn(tools.dft)},
+        data : {dft: wc.tn(tools.dft)}+
         if epoch == "perfect"
         then perfect(params, tools.anode, tools.field)
         else base(params, tools.anode, tools.field, rms_cuts[epoch]),