README.md in trackler-2.2.1.75

- old
+ new

@@ -26,10 +26,25 @@
 Given the input 19, the function would return the array
 ["double blink", "wink"] because 19 is 10011 in binary.
 Notice that the addition of 16 (10000 in binary)
 has caused the array to be reversed.
 
+## Exception messages
+
+Sometimes it is necessary to raise an exception. When you do this, you should include a meaningful error message to
+indicate what the source of the error is. This makes your code more readable and helps significantly with debugging. Not
+every exercise will require you to raise an exception, but for those that do, the tests will only pass if you include
+a message.
+
+To raise a message with an exception, just write it as an argument to the exception type. For example, instead of
+`raise Exception`, you shold write:
+
+```python
+raise Exception("Meaningful message indicating the source of the error")
+```
+
+
 ## Submitting Exercises
 
 Note that, when trying to submit an exercise, make sure the solution is in the `exercism/python/<exerciseName>` directory.
 
 For example, if you're submitting `bob.py` for the Bob exercise, the submit command would be something like `exercism submit <path_to_exercism_dir>/python/bob/bob.py`.
@@ -37,9 +52,9 @@
 For more detailed information about running tests, code style and linting,
 please see the [help page](http://exercism.io/languages/python).
 
 ## Source
 
-Bert, in Mary Poppins [http://www.imdb.com/character/ch0011238/quotes](http://www.imdb.com/character/ch0011238/quotes)
+Bert, in Mary Poppins http://www.imdb.com/title/tt0058331/quotes/qt0437047
 
 ## Submitting Incomplete Solutions
 It's possible to submit an incomplete solution so you can see how others have completed the exercise.