PStore#save_data

# File tmp/rubies/ruby-3.0.5/lib/pstore.rb, line 437
def save_data(original_checksum, original_file_size, file)
  new_data = dump(@table)

  if new_data.bytesize != original_file_size || CHECKSUM_ALGO.digest(new_data) != original_checksum
    if @ultra_safe && !on_windows?
      # Windows doesn't support atomic file renames.
      save_data_with_atomic_file_rename_strategy(new_data, file)
    else
      save_data_with_fast_strategy(new_data, file)
    end
  end

  new_data.replace(EMPTY_STRING)
end