added extra credit - comments

ex8.py

@@ -1,12 +1,20 @@
+# create a variable called formatter, which is a string made of 4 formatting characters
 formatter = "%r %r %r %r"
 
+# prints formatter with 4 digits
 print formatter % (1, 2, 3, 4)
+# prints formatter with 4 strings
 print formatter % ("one", "two", "three", "four")
+# prints formatter with 4 Booleans
 print formatter % (True, False, False, True)
+# prints formatter with itself, 4 times
 print formatter % (formatter, formatter, formatter, formatter)
+# prints formatter with 4 strings
 print formatter % (
     "I had this thing.",
     "That you could type up right.",
     "But it didn't sing.",
     "So I said goodnight."
-)
+)
+
+# It uses both double and single quotes because one of the lines has an apostrophe in it