Addresses minor comments (error message and better test).

pubs/commands/import_cmd.py

@@ -59,7 +59,7 @@ def many_from_path(ui, bibpath):
     for b in biblist:
         for k, b in b.items():
             if k in papers:
-                ui.warning('Duplicated citekey {}. Keeping last.'.format(k))
+                ui.warning('Duplicated citekey {}. Keeping the last one.'.format(k))
             try:
                 papers[k] = Paper(k, b)
                 papers[k].added = datetime.datetime.now()

tests/test_usecase.py

@@ -703,7 +703,7 @@ class TestUsecase(DataCommandTestCase):
         cmds = ['pubs init',
                 'pubs add data/pagerank.bib',
                 ('pubs edit Page99', [
-                    '', 'y',
+                    '@misc{Page99, title="TTT" author="X. YY"}', 'y',
                     '@misc{Page99, title="TTT", author="X. YY"}', '']),
                 ('pubs list', [], '[Page99] YY, X. "TTT" \n')
                 ]