format msgs

Author: ebonnal

Lib/test/test_concurrent_futures/executor.py

@@ -74,7 +74,7 @@ def test_map_exception(self):
                 not isinstance(referrer, futures.Future)
                 for referrer in gc.get_referrers(error)
             ),
-            msg="none of the referrers should be a Future.",
+            msg="none of the referrers should be a Future",
         )
 
     @support.requires_resource('walltime')
@@ -159,7 +159,7 @@ def test_map_buffersize_when_buffer_is_full(self):
         self.assertEqual(
             next(ints),
             buffersize,
-            msg="should have fetched only `buffersize` elements from `ints`.",
+            msg="should have fetched only `buffersize` elements from `ints`",
         )
 
     def test_shutdown_race_issue12456(self):