* Clean up SQL output in Tag and Account search methods
* Add basic coverage for Tag.search_for
* Add coverage for Account.search_for
* Add coverage for Account.advanced_search_for
Checking reblog vs original status was happening in multiple places
across the app. For views, this logic was encapsulated in a helper
method named `proper_status` but in the other layers of the app, the
logic was duplicated.
Because the logic is used at all layers of the app, we extracted it into
a `Status#proper` method on the model and changed all uses of the logic
to use this method. There is now a single source of truth for this
condition.
We added test coverage to untested methods that got refactored.
