old_contents: #!/usr/bin/env python
  # encoding: utf-8
  
  from __future__ import absolute_import, unicode_literals
  from .text_exporter import TextExporter
  from .util import get_tags_count
  
  
  class TagExporter(TextExporter):
      """This Exporter can convert entries and journals into json."""
      names = ["tags"]
      extension = "tags"
  
      @classmethod
      def export_entry(cls, entry):
          """Returns a markdown representation of a single entry."""
          return ", ".join(entry.tags)
  
      @classmethod
      def export_journal(cls, journal):
          """Returns a json representation of an entire journal."""
          tag_counts = get_tags_count(journal)
          result = ""
          if not tag_counts:
              return '[No tags found in journal.]'
          elif min(tag_counts)[0] == 0:
              tag_counts = filter(lambda x: x[0] > 1, tag_counts)
              result += '[Removed tags that appear only once.]\n'
          result += "\n".join("{0:20} : {1}".format(tag, n) for n, tag in sorted(tag_counts, reverse=True))
          return result
  
new_contents: #!/usr/bin/env python
  # encoding: utf-8
  
  from __future__ import absolute_import, unicode_literals
  from .text_exporter import TextExporter
  from .util import get_tags_count
  
  
  class TagExporter(TextExporter):
      """This Exporter can lists the tags for entries and journals, exported as a plain text file."""
      names = ["tags"]
      extension = "tags"
  
      @classmethod
      def export_entry(cls, entry):
          """Returns a list of tags for a single entry."""
          return ", ".join(entry.tags)
  
      @classmethod
      def export_journal(cls, journal):
          """Returns a list of tags and their frequency for an entire journal."""
          tag_counts = get_tags_count(journal)
          result = ""
          if not tag_counts:
              return '[No tags found in journal.]'
          elif min(tag_counts)[0] == 0:
              tag_counts = filter(lambda x: x[0] > 1, tag_counts)
              result += '[Removed tags that appear only once.]\n'
          result += "\n".join("{0:20} : {1}".format(tag, n) for n, tag in sorted(tag_counts, reverse=True))
          return result
  
subject: Update `Tag` exporter code documentation.