fix trace escape function to handle non-nil-terminated lists
fix trace escape function to handle non-nil-terminated lists

(they're valid data, and the dict module sometimes uses them)

boundary/webmachine,riak-synrc/webmachine,greyarea/webmachine,amerisoft/webmachine,sdebnath/webmachine,tipbit/webmachine,tsloughter/webmachine,anish-mp/webmachine,georgeye/webmachine,l1x/webmachine,ulfa/webmachine,flycodepl/webmachine,bipthelin/webmachine,capotej/webmachine,etnt/webmachine,djui/webmachine,cmeiklejohn/webmachine,chaslemley/webmachine,alinpopa/webmachine,b/webmachine,voluntas/webmachine,kardan/webmachine,varnit/webmachine,yfyf/webmachine,mfoemmel/webmachine,thijsterlouw/webmachine,kellymclaughlin/webmachine,raycmorgan/webmachine,khellan/webmachine,mmikulicic/webmachine,joewilliams/webmachine,kardan/webmachine,alinpopa/webmachine,bjnortier/webmachine,riak-synrc/webmachine,mfoemmel/webmachine,agx/webmachine,asynchrony/webmachine,srenatus/webmachine,yfyf/webmachine,rabbitmq/webmachine,djnym/webmachine,mabrek/webmachine,ReutersMedia/webmachine,michaelneale/webmachine,tsloughter/webmachine,greyarea/webmachine,riak-synrc/webmachine,voila/webmachine,choptastic/webmachine,kbrown/webmachine,vinoski/webmachine,joedevivo/webmachine,abanca/webmachine,majek/webmachine,neeraj9/webmachine,srstrong/webmachine,rabbitmq/webmachine,mkorszun/webmachine,zkessin/webmachine,rmeritz/webmachine,NineFX/webmachine,vinoski/webmachine,campanja/webmachine,cmeiklejohn/webmachine,nyarly/webmachine,thijsterlouw/webmachine,mghardy/webmachine,cstar/webmachine,srstrong/webmachine,seth/webmachine,campanja/webmachine,lemenkov/webmachine,sdebnath/webmachine,khellan/webmachine,kellymclaughlin/webmachine,rmeritz/webmachine,mabrek/webmachine,djui/webmachine,agx/webmachine,ulfa/webmachine,Gustav-Simonsson/webmachine,varnit/webmachine,joewilliams/webmachine,desiderius/webmachine,georgeye/webmachine,flycodepl/webmachine,beerriot/webmachine,rabbitmq/webmachine,zkessin/webmachine,b/webmachine,anish-mp/webmachine,seth/webmachine,liuhongchao/webmachine,spilgames/webmachine,ReutersMedia/webmachine,cstar/webmachine,FetLife/webmachine,pooya/webmachine,Webmachine/webmachine,benoitc/webmachine,srenatus/webmachine,nparry/webmachine,samuelrivas/webmachine,lemenkov/webmachine,raycmorgan/webmachine,Cy6erBr4in/webmachine,neeraj9/webmachine,bjnortier/webmachine,benoitc/webmachine,voluntas/webmachine,i11/webmachine,joedevivo/webmachine,Gustav-Simonsson/webmachine,chaslemley/webmachine,amerisoft/webmachine,joedevivo/webmachine,FetLife/webmachine,mdaguete/webmachine,basho/webmachine,tjarvstrand/webmachine,tjarvstrand/webmachine,tipbit/webmachine,tigertext/webmachine,Webmachine/webmachine,mdaguete/webmachine,tigertext/webmachine,chef/webmachine,mkorszun/webmachine,nyarly/webmachine,voila/webmachine,mondemand/webmachine,basho/webmachine,samuelrivas/webmachine,beerriot/webmachine,Cy6erBr4in/webmachine,davidcoallier/webmachine,mghardy/webmachine,l1x/webmachine,djnym/webmachine,etnt/webmachine,jvliwanag/webmachine,mbbx6spp/webmachine,fictivekin/webmachine,capotej/webmachine,NineFX/webmachine,bipthelin/webmachine,pooya/webmachine,choptastic/webmachine,fictivekin/webmachine,i11/webmachine,asynchrony/webmachine,spilgames/webmachine,jvliwanag/webmachine,mondemand/webmachine,kbrown/webmachine,nparry/webmachine,majek/webmachine,desiderius/webmachine,chef/webmachine,davidcoallier/webmachine,boundary/webmachine,mbbx6spp/webmachine,abanca/webmachine,mmikulicic/webmachine,michaelneale/webmachine,liuhongchao/webmachine