Fix formatting in exec help
Fix formatting in exec help

The description for `-node` was separated by tabs instead of spaces,
causing it to be incorrectly aligned.

hashicorp/consul,turbine/consul,dankraw/consul,tshak/consul,42wim/consul,mshean/consul,zeroae/consul,vamage/consul,sequenceiq/consul,youhong316/consul,turbine/consul,Thib17/consul,samaitra/consul,turbine/consul,sunadm/consul,i0rek/consul,mckennajones/consul,sequenceiq/consul,andygoalkeeper/consul,scalp42/consul,kingland/consul,andygoalkeeper/consul,turbine/consul,youhong316/consul,calgaryscientific/consul,Thib17/consul,i0rek/consul,tshak/consul,scalp42/consul,pmalmgren/consul,rhyas/consul,rhyas/consul,sweeneyb/consul,kingland/consul,dankraw/consul,tugbabodrumlu/consul,leowmjw/consul,42wim/consul,shaneog/consul,42wim/consul,Pivotal-Pierre-Delagrave/consul,kylemcc/consul,Thib17/consul,calgaryscientific/consul,Pivotal-Pierre-Delagrave/consul,shaneog/consul,Pivotal-Pierre-Delagrave/consul,dankraw/consul,sunadm/consul,sean-/consul,sweeneyb/consul,mckennajones/consul,kaskavalci/consul,sean-/consul,nicholascapo/consul,pmalmgren/consul,mshean/consul,jovandeginste/consul,kingland/consul,vamage/consul,leowmjw/consul,andygoalkeeper/consul,youhong316/consul,leowmjw/consul,samaitra/consul,samaitra/consul,i0rek/consul,mckennajones/consul,scalp42/consul,kylemcc/consul,turbine/consul,sweeneyb/consul,jovandeginste/consul,vamage/consul,sequenceiq/consul,zeroae/consul,kingland/consul,tugbabodrumlu/consul,nicholascapo/consul,Thib17/consul,jovandeginste/consul,lindenlab/consul,sequenceiq/consul,sequenceiq/consul,mckennajones/consul,kylemcc/consul,rhyas/consul,sunadm/consul,kingland/consul,lindenlab/consul,zeroae/consul,pmalmgren/consul,mckennajones/consul,Pivotal-Pierre-Delagrave/consul,Pivotal-Pierre-Delagrave/consul,calgaryscientific/consul,mshean/consul,samaitra/consul,dankraw/consul,zeroae/consul,sean-/consul,lindenlab/consul,scalp42/consul,rhyas/consul,jovandeginste/consul,shaneog/consul,mshean/consul,nicholascapo/consul,lindenlab/consul,andygoalkeeper/consul,vamage/consul,Thib17/consul,sweeneyb/consul,tshak/consul,i0rek/consul,shaneog/consul,nicholascapo/consul,kaskavalci/consul,samaitra/consul,sunadm/consul,zeroae/consul,scalp42/consul,calgaryscientific/consul,lindenlab/consul,tugbabodrumlu/consul,kaskavalci/consul,tshak/consul,sunadm/consul,kaskavalci/consul,sweeneyb/consul,dankraw/consul,kaskavalci/consul,tugbabodrumlu/consul,kylemcc/consul,shaneog/consul,tshak/consul,kylemcc/consul,pmalmgren/consul,42wim/consul,andygoalkeeper/consul,i0rek/consul,sean-/consul,pmalmgren/consul,rhyas/consul,tugbabodrumlu/consul,youhong316/consul,vamage/consul,42wim/consul,jovandeginste/consul,hashicorp/consul,nicholascapo/consul,hashicorp/consul,youhong316/consul,leowmjw/consul,hashicorp/consul,sean-/consul,leowmjw/consul,calgaryscientific/consul,mshean/consul