ref: e74f570df7843de1c4efbf1bba981e6b96038e33
dir: /bin/i-/
#!/bin/awk -f
BEGIN{
n = 1
if(ARGC > 1){
n = ARGV[1]; ARGC--
}
for(i = 1; i < 50; i++)
tabs[i] = tabs[i-1] " "
}
{
if(match($0, /^ +/) == 0){
print
next
}
sub(/^ +/, tabs[RLENGTH-n])
print
}