#!ruby -n
a=[]
scan(/#{'(\w+|\(([^)]+).)/'*2}?|./){a<<($1?(m=$2||$1,$4||$3;w=m.map(&:size).max;m.map{|n|(" "*((w-n.size)/2)+n).ljust w}.insert 1,"-"*w):[" ",$&," "])}
puts a.transpose.map(&:join),$/
Note that non-ascii characters in the above source code will be escaped (such as \x9f).