Drupal 7. I have used the t() function to translate many string in different languages. I used English as default language, and added t('This is a new string') all around my module files, template files, etc.
The problem is that I have changed the original string names several times, and in some instances, I didn't delete the "duplicate" entries, so there is garbage. Is there a way of listing or retrieving all the t() strings that I added? Maybe comparing with a fresh Drupal installation and exporting a template *.po and using a program to compare the changes ?