test: update expected value for all Python versions

Author: weibullguy

tests/_data/string_files/do_format_code.toml

@@ -178,7 +178,7 @@ source='''def foo():
     """
     Hello foo.
     """
-    x = \
+    x =\
             1'''
 expected='''def foo():
     """Hello foo."""
@@ -187,7 +187,7 @@ expected='''def foo():
 # Python 3.13+ seems to handle this differently.
 expected313='''def foo():
     """Hello foo."""
-    x = \
+    x =\
             1'''
 
 [code_comments]

tests/formatter/test_do_format_code.py

@@ -146,10 +146,7 @@ def test_do_format_code(test_key, test_args, args):
     )
 
     source = TEST_STRINGS[test_key]["source"]
-    if test_key == "escaped_newlines" and sys.version_info >= (3, 13):
-        expected = TEST_STRINGS[test_key]["expected313"]
-    else:
-        expected = TEST_STRINGS[test_key]["expected"]
+    expected = TEST_STRINGS[test_key]["expected"]
 
     result = uut._do_format_code(source)
     assert result == expected, f"\nFailed {test_key}\nExpected {expected}\nGot {result}"