[delete only adjacent vs delete all duplicates globally]
Without having tried the plugin (but just reading this thread) I would have expected to do be able to do this actually.
I have now updated the code to add a second command ("Delete All Duplicate Lines") which does delete all duplicate lines, not only those that are adjacent. The implementation is based on a Bloom filter, which seems to work pretty well for the test cases I've used.
As always, any and all feedback is welcome.
Regards,
/Emil