class Sass::Tree::Visitors::ToCss

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