At present most of the code between the Drupal 6 and 7 branches is identical. Having to make changes in both branches to add new features or fix bugs is error-prone and a waste of time. This issue is to refactor the code so that all common code is in a single .inc file. This should make it easier in the future to roll out a Drupal 8.x version.
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Comment #1
andrewfn commentedAll code has now been refactored with the common code in the .inc file which is identical between the D6 and D7 branches.