Fix comment typo.
After finding a test in Item_Model_Test that didn't end in the string "_test" and
fixing it in 9ba9f3953132c5c5de9efb0a4724c7b9300dc9ea I decided to write a test to make
sure that we don't have any other overlooked tests.  We don't.
Merge branch 'master' of github.com:gallery/gallery3