grains: Move input (square) to input object

[petertseng]

grains 1.1.0

As proposed and accepted in #996

have_input = false

ARGF.each_line { |l|
  if l.include?('version')
    ver = l.split(?")[3]
    ver_components = ver.split(?.).map(&:to_i)
    ver_components[1] += 1
    ver_components[2] = 0
    l[ver] = ver_components.join(?.)
  end

  have_input &&= !l.include?('"description"')

  first_non_space = l.index(/\S/)
  if l.include?('"input"')
    have_input = true
    input = l.split(?:).last.to_i
    puts ' ' * first_non_space + '"input": {'
    puts ' ' * first_non_space + '  "square": ' + input.to_s
    puts ' ' * first_non_space + '},'
    next
  end

  puts ' ' * first_non_space + '"input": {},' if l.include?('"expected"') && !have_input

  puts l
}

[petertseng]

That's the last of them, so I need to revert the thing after.