bpo-43651: PEP 597: Fix EncodingWarning in some tests (GH-25145)
* test_asyncio
* test_bz2
* test_math
* test_cmath
* test_cmd_line
* test_cmd_line_script
* test_compile
* test_contextlib
* test_profile
* ctypes/test/test_find
* test_multiprocessing
* test_configparser
* test_csv
* test_dbm_dumb
* test_decimal
* test_difflib
* os.fdopen() calls io.text_encoding() to emit EncodingWarning for right place.
diff --git a/Lib/test/test_difflib.py b/Lib/test/test_difflib.py
index 42ac1fd..9a24e00 100644
--- a/Lib/test/test_difflib.py
+++ b/Lib/test/test_difflib.py
@@ -241,7 +241,7 @@ def test_html_diff(self):
#with open('test_difflib_expect.html','w') as fp:
# fp.write(actual)
- with open(findfile('test_difflib_expect.html')) as fp:
+ with open(findfile('test_difflib_expect.html'), encoding="utf-8") as fp:
self.assertEqual(actual, fp.read())
def test_recursion_limit(self):