old_contents: #!/usr/bin/env python
  
  def rgb_to_hex(rgb):
      """Convert RGB color to hex color."
      :param rgb: RGB color
      :type rgb: tuple
      :return: Hex color
      :rtype: str
  
      """
  
      return "#{0:02x}{1:02x}{2:02x}".format(*rgb)
  
  def hex_to_rgb(hexa):
      """Convert hex color to RGB color.
      :param hexa: Hex color
      :type hexa: str
      :return: RGB color
      :rtype: tuple
  
      """
  
      return tuple(int(hexa[i:i+2], 16) for i in (0, 2 ,4))
  
new_contents: #!/usr/bin/env python
  
  def rgb_to_hex(rgb):
      """Convert RGB color to hex color."
      :param rgb: RGB color
      :type rgb: tuple
      :return: Hex color
      :rtype: str
  
      """
  
      return "#{0:02x}{1:02x}{2:02x}".format(*rgb)
  
  def hex_to_rgb(hexa):
      """Convert hex color to RGB color.
      :param hexa: Hex color
      :type hexa: str
      :return: RGB color
      :rtype: tuple
  
      """
      
      return tuple(int(hexa[i:i+2], 16) for i in (0, 2, 4))
  
subject: Fix code typo