# File lib/sass/tree/visitors/to_css.rb, line 61
  def erase!(chars)
    return if chars == 0
    str = @result.slice!(-chars..-1)
    newlines = str.count("\n")
    if newlines > 0
      @line -= newlines
      @offset = @result[@result.rindex("\n") || 0..-1].size
    else
      @offset -= chars
    end
  end