Quality columns are now optional in NUC_SEQS views + minor fixes

python/obitools3/commands/grep.pyx

@@ -75,6 +75,8 @@ def run(config):
     # Create output view with the line selection
     oview = d.new_view(config['obi']['outputview'], view_to_clone=iview, line_selection=selection, comments="obi grep: "+config['grep']['predicate']+"\n")
 
+    print(oview.__repr__())
+
     iview.save_and_close()
     oview.save_and_close()
     d.close()