Issue #22823: Use set literals instead of creating a set from a list
diff --git a/Lib/mailbox.py b/Lib/mailbox.py
index 2eee76c..145b204 100644
--- a/Lib/mailbox.py
+++ b/Lib/mailbox.py
@@ -1230,8 +1230,8 @@
class Babyl(_singlefileMailbox):
"""An Rmail-style Babyl mailbox."""
- _special_labels = frozenset(('unseen', 'deleted', 'filed', 'answered',
- 'forwarded', 'edited', 'resent'))
+ _special_labels = frozenset({'unseen', 'deleted', 'filed', 'answered',
+ 'forwarded', 'edited', 'resent'})
def __init__(self, path, factory=None, create=True):
"""Initialize a Babyl mailbox."""