Update page 'Day 3 homework'

Day 3 homework.md

@@ -29,7 +29,7 @@ class BoundedInt():
 5. Don't forget that you can access the value of a BoundedInt by using either `.i` on it, or `int()`, now that you've passed test 1.
 6. Modify the template to pass test 2, which checks that:
     * Your class implements the + operator.
-    * It throws ValueError when attempting to add two BoundedInts that will exceed the limits.
+    * It throws ValueError when attempting to add another BoundedInt that would exceed `self.max`.
 7. Do the same as 6, but for subtraction, to pass test 3.
 8. Modify the template so it also supports adding a regular integer to a BoundedInt, to pass test 4.  Note that you can use `isinstance()` to determine the class of a variable.
 9. Same as 8, but for subtraction.