Python 2.6 on TravisCI

.travis.yml

@@ -1,7 +1,9 @@
 language: python
 python:
     - "2.7"
+    - "2.6"
 install:
     - pip install . --use-mirrors
     - pip install pylast flask --use-mirrors
+    - "if [[ $TRAVIS_PYTHON_VERSION == '2.6' ]]; then pip install unittest2 --use-mirrors; fi"
 script: nosetests

beets/ui/commands.py

@@ -314,7 +314,7 @@ def choose_candidate(candidates, singleton, rec, color, timid,
             opts = ('Use as-is', 'Skip', 'Enter search', 'enter Id',
                     'aBort')
         else:
-            print_("No matching release found for {} tracks."
+            print_("No matching release found for {0} tracks."
                    .format(itemcount))
             print_('For help, see: '
                    'https://github.com/sampsyo/beets/wiki/FAQ#wiki-nomatch')