My bibtex file contains two editions of a book, but the "find duplicates" function considers them to be duplicates and tries to merge them.

Also, shouldn't the jabref gitup bug reporter accept bibtex files for uploading? As it is, it's necessary to rename them to *.txt.

JabRef version

JabRef 4.0.0-dev--snapshot--2017-06-29--master--7e50e84a1
Windows 7 6.1 amd64
Java 1.8.0_131

Steps to reproduce:

1. Load the attached bib file
2. Quality--> Find Duplicates
3. A window should pop up with a merge suggestion

example2editionBooks.txt