Use the admin > tools > developer tools;

enter a phrase or part thereof from the text that persists; search all catalog files.
This should find the file(s) that contain this text.

Smack your forehead when you recall that this was the file you altered.

BTW: search this forum for using the override system, as if you were using it and correctly there would be only a few files that you would have in your override directories, especially on a relatively new install. This would make locating the files that you have changed much easier.