[3.14] gh-97032: avoid test_squeezer crash on macOS buildbots (gh-115508) (GH-148141) (#148414)

Co-authored-by: Neil Schemenauer <[email protected]>
Co-authored-by: Ned Deily <[email protected]>

Author: 3 people

Lib/idlelib/idle_test/test_squeezer.py

@@ -170,6 +170,7 @@ def test_write_not_stdout(self):
 
     def test_write_stdout(self):
         """Test Squeezer's overriding of the EditorWindow's write() method."""
+        requires('gui')
         editwin = self.make_mock_editor_window()
 
         for text in ['', 'TEXT']: