old_contents: """Various display related classes.
  
  Authors : MinRK, dannystaple
  """
  import urllib
  
  class YouTubeVideo(object):
      """Class for embedding a YouTube Video in an IPython session, based on its video id.
  
      e.g. to embed the video on this page:
  
      http://www.youtube.com/watch?v=foo
  
      you would do:
  
      vid = YouTubeVideo("foo")
      display(vid)
      
      To start from 30 seconds:
      
      vid = YouTubeVideo("abc", start=30)
      display(vid)
      
      To calculate seconds from time as hours, minutes, seconds use:
      start=int(timedelta(hours=1, minutes=46, seconds=40).total_seconds())
  
      Other parameters can be provided as documented at 
      https://developers.google.com/youtube/player_parameters#parameter-subheader
      """
  
      def __init__(self, id, width=400, height=300, **kwargs):
          self.id = id
          self.width = width
          self.height = height
          self.params = kwargs
  
      def _repr_html_(self):
          """return YouTube embed iframe for this video id"""
          if self.params:
              params = "?" + urllib.urlencode(self.params)
          else:
              params = ""
          return """
              <iframe
                  width="%i"
                  height="%i"
                  src="http://www.youtube.com/embed/%s%s"
                  frameborder="0"
                  allowfullscreen
              ></iframe>
          """%(self.width, self.height, self.id, params)
new_contents: """Various display related classes.
  
  Authors : MinRK, dannystaple
  """
  import urllib
  
  class YouTubeVideo(object):
      """Class for embedding a YouTube Video in an IPython session, based on its video id.
  
      e.g. to embed the video on this page:
  
      http://www.youtube.com/watch?v=foo
  
      you would do:
  
      vid = YouTubeVideo("foo")
      display(vid)
      
      To start from 30 seconds:
      
      vid = YouTubeVideo("abc", start=30)
      display(vid)
      
      To calculate seconds from time as hours, minutes, seconds use:
      start=int(timedelta(hours=1, minutes=46, seconds=40).total_seconds())
  
      Other parameters can be provided as documented at 
      https://developers.google.com/youtube/player_parameters#parameter-subheader
      """
  
      def __init__(self, id, width=400, height=300, **kwargs):
          self.id = id
          self.width = width
          self.height = height
          self.params = kwargs
  
      def _repr_html_(self):
          """return YouTube embed iframe for this video id"""
          if self.params:
              params = "?" + urllib.urlencode(self.params)
          else:
              params = ""
          return """
              <iframe
                  width="%i"
                  height="%i"
                  src="http://www.youtube.com/embed/%s%s"
                  frameborder="0"
                  allowfullscreen
              ></iframe>
          """ % (self.width, self.height, self.id, params)
  
subject: Add newline, spaces on string format