old_contents: x = f"There are {10} types of people."
  binary = "binary"
  do_not = "don't"
  y = f"Those who know {binary} and those who {do_not}."
  
  print(x)
  print(y)
  
  print("I said: {x}.")
  print("I also said: '{y}'.")
  
  hilarious = False
  joke_evaluation = "Isn't that joke so funny?! {}"
  
  print(joke_evaluation.format(hilarious))
  
  w = "This is the left side of..."
  e = "a string with a right side."
  
  print(w + e)
  
  
  
new_contents: # left out assignment for types_of_people mentioned in intro
  types_of_people = 10
  # change variable from 10 to types_of_people
  x = f"There are {types_of_people} types of people."
  
  binary = "binary"
  do_not = "don't"
  y = f"Those who know {binary} and those who {do_not}."
  
  print(x)
  print(y)
  
  # left out f in front of string and omit extra period
  print(f"I said: {x}")
  # left out f in front of string and omit extra period
  print(f"I also said: '{y}'")
  
  hilarious = False
  joke_evaluation = "Isn't that joke so funny?! {}"
  
  print(joke_evaluation.format(hilarious))
  
  w = "This is the left side of..."
  e = "a string with a right side."
  
  print(w + e)
  
  # change "What You Should See" snapshot to reflect changes
  
subject: Add missing variable and correct f-strings