bpo-35133: Fix mistakes when concatenate string literals on different lines. (GH-10284)

Two kind of mistakes:

1. Missed space. After concatenating there is no space between words.

2. Missed comma. Causes unintentional concatenating in a list of strings.

1 files changed, 1 insertions, 1 deletions

diff --git a/Lib/unittest/mock.py b/Lib/unittest/mock.py
index 1977b87..a9c82dc 100644
--- a/Lib/unittest/mock.py
+++ b/Lib/unittest/mock.py
@@ -1772,7 +1772,7 @@ _all_magics = _magics | _non_defaults
 
 _unsupported_magics = {
     '__getattr__', '__setattr__',
-    '__init__', '__new__', '__prepare__'
+    '__init__', '__new__', '__prepare__',
     '__instancecheck__', '__subclasscheck__',
     '__del__'
 }