module Rouge::Indentation

def indentation(indent_str)
  puts "    indentation #{indent_str.inspect}" if @debug
  puts "    block_indentation: #{@block_indentation.inspect}" if @debug
  @last_indentation = indent_str
  # if it's an indent and we know where to go next,
  # push that state.  otherwise, push content and
  # clear the block state.
  if (@block_state &&
      indent_str.start_with?(@block_indentation) &&
      indent_str != @block_indentation
  )
    push @block_state
  else
    @block_state = @block_indentation = nil
    push :content
  end
end