Given Im rendering an template `/layout/hello.html.erb`, assert_template was
passing with any string that matches. This behavior allowed false passing like:
assert_template "layout"
assert_template "out/hello"
Now the passing possibilities are:
assert_template "layout/hello"
assert_template "hello"
fixing assert_template bug when template matches expected, but not ends with
Cherry Pick Merge: Fixes issue #3849 assert_template false positive
taking redundant test off
prevening incorrect assert_template when rendering with repeated names in path
updating CHANGELOG with bugfix: assert_template false passing
