When a NonInferrableControllerError is raised, make the proposed fix clearer in the error message. Closes #10199 [danger]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@8283 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

Introduce TestCase subclasses for testing rails applications allowing tests to be DRY'd up a bit and to provide a path toward tidying up our monkeypatching of test/unit.


git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@8022 5ecf4fe2-1ee6-0310-87b1-e25e094e27de