fix a typerr in bach_complete.
fix a typerr in bach_complete.

Review URL: http://codereview.chromium.org/1576011

BugRoger/scripts,endocode/scripts,fivethreeo/scripts,marineam/coreos-scripts,vmware/coreos-scripts,glevand/coreos--scripts,sigma/coreos-scripts,vmware/coreos-scripts,mjg59/scripts,mischief/scripts,crawford/scripts,mjg59/scripts,bcwaldon/coreos-scripts,andrejro/coreos--scripts,trnubo/scripts,fivethreeo/scripts,bcwaldon/coreos-scripts,BugRoger/scripts,andrejro/coreos--scripts,nicescale/scripts,zhang0137/scripts,zhang0137/scripts,smilart/scripts,mischief/scripts,trnubo/scripts,bcwaldon/coreos-scripts,coreos/scripts,smilart/scripts,BugRoger/scripts,andrejro/coreos--scripts,nicescale/scripts,mjg59/scripts,fivethreeo/scripts,trnubo/scripts,sigma/coreos-scripts,coreos/scripts,crawford/scripts,smilart/scripts,nicescale/scripts,gtank/scripts,gtank/scripts,glevand/coreos--scripts,endocode/scripts,endocode/scripts,crawford/scripts,zhang0137/scripts,sigma/coreos-scripts,marineam/coreos-scripts,mischief/scripts,gtank/scripts,vmware/coreos-scripts,marineam/coreos-scripts