tests/test_03_armor.py: fix syntax

Without this fix, there is an immediate failure when running pytest-3.

Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>

tests/test_03_armor.py

@@ -130,9 +130,9 @@ block_attrs = {
          ('type',          'encrypted')],
 
     'tests/testdata/blocks/revochiio.asc':
-        [('created',       datetime.utcnow() - timedelta(days=1),
+        [('created',       datetime.utcnow() - timedelta(days=1)),
          ('fingerprint',   "AE15 9FF3 4C1A 2426 B7F8 0F1A 560C F308 EF60 CFA3"),
-         ('expires_at',    datetime.utcnow() + timedelta(days=1),
+         ('expires_at',    datetime.utcnow() + timedelta(days=1)),
          ('is_expired',    False),
          ('is_primary',    True),
          ('is_protected',  False),