README.md: Remove references to Python 2.7 from README.md (exercism#1704) (exercism#1818)

joaoluizn · cmccandless · cmccandless · commit 50f5693148ff · 2019-06-10T08:39:34.000-04:00
Co-Authored-By: Corey McCandless &lt;cmccandless@users.noreply.github.com&gt;
diff --git a/README.md b/README.md
@@ -30,14 +30,14 @@ A list of missing exercise can be found here: https://github.com/exercism/python
 
 ### Testing
 
-All exercises must be compatible with Python versions 2.7 and 3.4 upwards.
+All exercises must be compatible with Python version 3.4 upwards.
 
-To test a single exercise (e.g., with Python 2.7):
+To test a single exercise:
 ```
-python2.7 test/check-exercises.py [exercise-name]
+python3 test/check-exercises.py [exercise-name]
 ```
 
-To test all exercises (e.g., with Python 3):
+To test all exercises:
 ```
 python3 test/check-exercises.py
 ```
