Refactor challenge to use correct input & output layout

3c_column-string_alignment.rb

# prints line numbers before each line & aligns the ":"

class ListGenerator
  def column_alignment(lines)
    lines = lines.split("\n")
    lines.map.with_index(1) do |output, line_number|
      "Line #{number_spacing(lines, line_number)}#{line_number}:  "\
      "#{output}"

    end
  end

  private

    def number_spacing(lines, line_number)
      max_line_digits = lines.count.to_s.size
      " " *  (max_line_digits - line_number.to_s.size)
    end
end

if __FILE__ == $PROGRAM_NAME
  lines = "I think the challenge states to split a string. Which may
be programmers speech, but should probably have been presented as
split a text.
So you would be missing a step here, I think.
Your names are right for the code, I think. But that is because you
read into being handed a string.
Think about wanting to present a book with numbered lines.
When I pulled your repository and ran the program, it looks like a list of words, rather than a line."

puts ListGenerator.new().column_alignment(lines)
end