Fix :set completion for "number" options’ default and current values.
Fix :set completion for "number" options’ default and current values.

Kjwon15/dactyl,moonshadow/dactyl,5digits/dactyl,madand/pentadactyl-pm,nathyong/dactyl,invl/dactyl,airodactyl/dactyl,5digits/dactyl,Kjwon15/dactyl,nathyong/dactyl,madand/pentadactyl-pm,invl/dactyl,airodactyl/dactyl,nathyong/dactyl,invl/dactyl,madand/pentadactyl-pm,invl/dactyl,5digits/dactyl,moonshadow/dactyl,5digits/dactyl,5digits/dactyl,5digits/dactyl,airodactyl/dactyl,madand/pentadactyl-pm,invl/dactyl,madand/pentadactyl-pm,moonshadow/dactyl,moonshadow/dactyl,Kjwon15/dactyl,Kjwon15/dactyl,Kjwon15/dactyl,moonshadow/dactyl,Kjwon15/dactyl,moonshadow/dactyl,nathyong/dactyl,madand/pentadactyl-pm,nathyong/dactyl,airodactyl/dactyl,airodactyl/dactyl,nathyong/dactyl,invl/dactyl,airodactyl/dactyl