old_contents: from datetime import date
  
  
  def earth_date_to_star_date(earth_year, earth_month, earth_day):
      """Converts an Earth date to a star date.
  
      >>> earth_date_to_star_date(2323, 1, 1)
      0.0
      >>> earth_date_to_star_date(2015, 1, 1)
      -308000.0
      >>> earth_date_to_star_date(2014, 12, 31)
      -308002.7
      """
  
      star_year = (earth_year - 2323) * 1000
      first_date_of_year = date(year=earth_year, month=1, day=1)
      earth_date = date(year=earth_year, month=earth_month, day=earth_day)
      days_elapsed_in_year = earth_date - first_date_of_year 
      star_day = round(days_elapsed_in_year.days / 365.0 * 1000, 1)
      return star_year + star_day
  
new_contents: from datetime import date
  
  
  def earth_date_to_star_date(earth_year, earth_month, earth_day):
      """Converts an Earth date to a star date.
  
      >>> earth_date_to_star_date(2323, 1, 1)
      0.0
      >>> earth_date_to_star_date(2015, 1, 1)
      -308000.0
      >>> earth_date_to_star_date(2014, 12, 31)
      -308002.7
      """
  
      star_year = (earth_year - 2323) * 1000
      first_date_of_year = date(year=earth_year, month=1, day=1)
      earth_date = date(year=earth_year, month=earth_month, day=earth_day)
      days_elapsed_in_year = earth_date - first_date_of_year
      star_day = round(days_elapsed_in_year.days / 365.0 * 1000, 1)
      return star_year + star_day
  
subject: remove trailing whitespace