old_contents: # -*- coding: utf-8 -*-
  
  """Jinja2 extensions."""
  
  import json
  
  from jinja2.ext import Extension
  
  
  class JsonifyExtension(Extension):
      """Jinja2 extension to convert a python object to json."""
  
      def __init__(self, environment):
          """Initilize extension with given environment."""
          super(JsonifyExtension, self).__init__(environment)
  
          def jsonify(obj):
              return json.dumps(obj, sort_keys=True, indent=4)
  
          environment.filters['jsonify'] = jsonify
  
new_contents: # -*- coding: utf-8 -*-
  
  """Jinja2 extensions."""
  
  import json
  
  from jinja2.ext import Extension
  
  
  class JsonifyExtension(Extension):
      """Jinja2 extension to convert a Python object to JSON."""
  
      def __init__(self, environment):
          """Initialize the extension with the given environment."""
          super(JsonifyExtension, self).__init__(environment)
  
          def jsonify(obj):
              return json.dumps(obj, sort_keys=True, indent=4)
  
          environment.filters['jsonify'] = jsonify
  
subject: Fix typo and improve grammar in doc string