old_contents: # encoding: utf-8
  
  """
  .. codeauthor:: Tsuyoshi Hombashi <gogogo.vm@gmail.com>
  """
  
  from __future__ import absolute_import
  import abc
  
  import six
  
  
  @six.add_metaclass(abc.ABCMeta)
  class TableWriterInterface(object):
      """
      Interface class of writing table.
      """
  
      @abc.abstractproperty
      def support_split_write(self):  # pragma: no cover
          pass
  
      @abc.abstractmethod
      def write_table(self):   # pragma: no cover
          pass
  
      @abc.abstractmethod
      def write_table_iter(self):  # pragma: no cover
          pass
  
      @abc.abstractmethod
      def _write_value_row_separator(self):  # pragma: no cover
          pass
  
  
  @six.add_metaclass(abc.ABCMeta)
  class TextWriterInterface(object):
      """
      Interface class of writing texts.
      """
  
      @abc.abstractmethod
      def write_null_line(self):   # pragma: no cover
          pass
  
  
  @six.add_metaclass(abc.ABCMeta)
  class IndentationInterface(object):
      """
      Interface class of indentation methods.
      """
  
      @abc.abstractmethod
      def set_indent_level(self, indent_level):   # pragma: no cover
          pass
  
      @abc.abstractmethod
      def inc_indent_level(self):   # pragma: no cover
          pass
  
      @abc.abstractmethod
      def dec_indent_level(self):   # pragma: no cover
          pass
  
new_contents: # encoding: utf-8
  
  """
  .. codeauthor:: Tsuyoshi Hombashi <gogogo.vm@gmail.com>
  """
  
  from __future__ import absolute_import
  import abc
  
  import six
  
  
  @six.add_metaclass(abc.ABCMeta)
  class TableWriterInterface(object):
      """
      Interface class of writing table.
      """
  
      @abc.abstractproperty
      def support_split_write(self):  # pragma: no cover
          pass
  
      @abc.abstractmethod
      def write_table(self):  # pragma: no cover
          pass
  
      @abc.abstractmethod
      def write_table_iter(self):  # pragma: no cover
          pass
  
      @abc.abstractmethod
      def _write_value_row_separator(self):  # pragma: no cover
          pass
  
  
  @six.add_metaclass(abc.ABCMeta)
  class TextWriterInterface(object):
      """
      Interface class of writing texts.
      """
  
      @abc.abstractmethod
      def write_null_line(self):  # pragma: no cover
          pass
  
  
  @six.add_metaclass(abc.ABCMeta)
  class IndentationInterface(object):
      """
      Interface class of indentation methods.
      """
  
      @abc.abstractmethod
      def set_indent_level(self, indent_level):  # pragma: no cover
          pass
  
      @abc.abstractmethod
      def inc_indent_level(self):  # pragma: no cover
          pass
  
      @abc.abstractmethod
      def dec_indent_level(self):  # pragma: no cover
          pass
  
subject: Remove spaces