bpo-46588: fix typo in test_calltip.py  (GH-31119)

(cherry picked from commit 222865daabfa7a8b12ca9a5e9c23b9ce217448f1)

Co-authored-by: Caio Agiani <agianicaio@gmail.com>
diff --git a/Lib/idlelib/idle_test/test_calltip.py b/Lib/idlelib/idle_test/test_calltip.py
index b23915c..e8d2bd1 100644
--- a/Lib/idlelib/idle_test/test_calltip.py
+++ b/Lib/idlelib/idle_test/test_calltip.py
@@ -106,7 +106,7 @@ def test_signature_wrap(self):
 If you want to completely replace the main wrapping algorithm,
 you\'ll probably have to override _wrap_chunks().''')
 
-    def test_properly_formated(self):
+    def test_properly_formatted(self):
 
         def foo(s='a'*100):
             pass