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

(cherry picked from commit 222865d)

Co-authored-by: Caio Agiani <[email protected]>

Author: miss-islington

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