appsignal/appsignal — pull request #1 by thijsc (2013-08-02 15:43:24+00:00)
Title: Fix backtrace cleaner usage for Rails 4

In our previous implementation we called filter on the backtrace
cleaner, which strips more backtrace lines than we want since Rails 4.

We now call clean with a second nil argument to do this the proper way.