fixed autocompletion for only a single available completion
fixed autocompletion for only a single available completion

ibm-et/IRkernel,gdtm86/IRkernel,JanSchulz/IRkernel,Phobia0ptik/IRkernel,ChinaQuants/IRkernel,mikecroucher/IRkernel,elaOnMars/IRkernel,ibm-et/IRkernel,chendaniely/IRkernel,rgbkrk/IRkernel