ref: 3c724f5a03ba3846bce90e0fbc11e4f4e5b5e09a
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
}