README.md in trackler-2.2.1.75

- old
+ new

@@ -1,8 +1,8 @@
 # Beer Song
 
-Produce the lyrics to that beloved classic, that field-trip favorite: 99 Bottles of Beer on the Wall.
+Recite the lyrics to that beloved classic, that field-trip favorite: 99 Bottles of Beer on the Wall.
 
 Note that not all verses are identical.
 
 ```text
 99 bottles of beer on the wall, 99 bottles of beer.
@@ -317,9 +317,24 @@
   conditionals? Try replacing the conditionals with polymorphism, if it
   applies in this language. How readable is it?
 
 Then please share your thoughts in a comment on the submission. Did this
 experiment make the code better? Worse? Did you learn anything from it?
+
+## 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.
 