old_contents: from __future__ import absolute_import
  import sublime
  import traceback
  
  ST3 = int(sublime.version()) >= 3000
  
  if ST3:
      from markdown import Markdown, util
      from markdown.extensions import Extension
      import importlib
  else:
      from markdown import Markdown, util
      from markdown.extensions import Extension
  
  
  class StMarkdown(Markdown):
      def __init__(self, *args, **kwargs):
          Markdown.__init__(self, *args, **kwargs)
          self.Meta = {}
  
      def registerExtensions(self, extensions, configs):
          """
          Register extensions with this instance of Markdown.
  
          Keyword arguments:
  
          * extensions: A list of extensions, which can either
             be strings or objects.  See the docstring on Markdown.
          * configs: A dictionary mapping module names to config options.
  
          """
          for ext in extensions:
              try:
                  if isinstance(ext, util.string_type):
                      ext = self.build_extension(ext, configs.get(ext, []))
                  if isinstance(ext, Extension):
                      ext.extendMarkdown(self, globals())
                  elif ext is not None:
                      raise TypeError(
                          'Extension "%s.%s" must be of type: "markdown.Extension"'
                          % (ext.__class__.__module__, ext.__class__.__name__))
              except:
                  print(str(traceback.format_exc()))
                  continue
  
          return self
  
new_contents: from __future__ import absolute_import
  import sublime
  import traceback
  
  from markdown import Markdown, util
  from markdown.extensions import Extension
  import importlib
  
  
  class StMarkdown(Markdown):
      def __init__(self, *args, **kwargs):
          Markdown.__init__(self, *args, **kwargs)
          self.Meta = {}
  
      def registerExtensions(self, extensions, configs):
          """
          Register extensions with this instance of Markdown.
  
          Keyword arguments:
  
          * extensions: A list of extensions, which can either
             be strings or objects.  See the docstring on Markdown.
          * configs: A dictionary mapping module names to config options.
  
          """
          for ext in extensions:
              try:
                  if isinstance(ext, util.string_type):
                      ext = self.build_extension(ext, configs.get(ext, []))
                  if isinstance(ext, Extension):
                      ext.extendMarkdown(self, globals())
                  elif ext is not None:
                      raise TypeError(
                          'Extension "%s.%s" must be of type: "markdown.Extension"'
                          % (ext.__class__.__module__, ext.__class__.__name__))
              except:
                  print(str(traceback.format_exc()))
                  continue
  
          return self
  
subject: Remove some more ST2 specific code