old_contents: import os
  try:
      import simplejson as json
  except ImportError:
      import json
  
  
  content_config_file = 'gitpress.json'
  theme_config_file = 'gitpress_theme.json'
  
  
  def content_config(path):
      """Returns the configuration for the specified working directory."""
      return from_file(os.path.join(path, content_config_file))
  
  
  def theme_config(path):
      """Returns the configuration for the specified theme directory."""
      return from_file(os.path.join(path, theme_config_file))
  
  
  def from_file(config_file):
      """Returns the configuration from the specified file."""
      if not os.path.exists(config_file):
          return {}
      with file(config_file) as f:
          return json.load(f)
  
new_contents: import os
  try:
      import simplejson as json
  except ImportError:
      import json
  
  
  config_file = '_config.json'
  theme_config_file = 'gitpress_theme.json'
  
  
  def content_config(path):
      """Returns the configuration for the specified working directory."""
      return from_file(os.path.join(path, config_file))
  
  
  def theme_config(path):
      """Returns the configuration for the specified theme directory."""
      return from_file(os.path.join(path, theme_config_file))
  
  
  def from_file(config_file):
      """Returns the configuration from the specified file."""
      if not os.path.exists(config_file):
          return {}
      with file(config_file) as f:
          return json.load(f)
  
subject: Rename content_config_file and its value.