Merge pull request realpython#354 from JeffPaine/patch-1

Remove python 2.5 from example travis config (not supported)

Author: sigmavirus24

docs/scenarios/ci.rst

@@ -65,11 +65,10 @@ example content::
 
     language: python
     python:
-      - "2.5"
       - "2.6"
       - "2.7"
-      - "3.1"
       - "3.2"
+      - "3.3"
     # command to install dependencies
     script: python tests/test_all_of_the_units.py
     branches: