remove extra indentation

indent_chomp.rb

#!/usr/bin/env ruby

data = if file = ARGV.shift
         File.open(file).read
       else
         <<DATA
    command "simple-prompt", "Toggle the simple prompt." do
      case Pry.active_instance.prompt
      when Pry::SIMPLE_PROMPT
        Pry.active_instance.prompt = Pry::DEFAULT_PROMPT
      else
        Pry.active_instance.prompt = Pry::SIMPLE_PROMPT
      end
    end
DATA
       end

def unindent_region string
  indent = string[/^\s+/].size
  unindented = ""

  string.each_line do |line|
    unindented << line[indent..-1]
  end

  unindented
end

print unindent_region(data)