Improved the message when fixing an entry ('Which one...').

diff --git a/pl.py b/pl.py
index a7b7dcd..3bb4a0e 100755
--- a/pl.py
+++ b/pl.py
@@ -271,8 +271,8 @@ def playlist_is_ok(playlist, options):
                             if options.auto_fix:
                                 replace = '1'
                             else:
-                                message = 'Which one to use? [%s, nothing to ignore] '
-                                seq = ''.join([str(num + 1) for num in range(nbr_suggs)])
+                                message = 'Which one to use? [%s or nothing to ignore] '
+                                seq = ','.join([str(num + 1) for num in range(nbr_suggs)])
                                 replace = raw_input(message % seq)
                             if replace.strip():
                                 try: