changed refernce to issue in test

Author: debnathshoham

pandas/tests/io/excel/test_readers.py

@@ -578,9 +578,10 @@ def test_dtype_mangle_dup_cols(self, read_ext, dtypes, exp_value):
         basename = "df_mangle_dup_col_dtypes"
         dtype_dict = {"a": str, **dtypes}
         dtype_dict_copy = dtype_dict.copy()
+        # GH#42462
         result = pd.read_excel(basename + read_ext, dtype=dtype_dict)
         expected = DataFrame({"a": ["1"], "a.1": [exp_value]})
-        assert dtype_dict == dtype_dict_copy, "dtype dict changed"  # GH 42462
+        assert dtype_dict == dtype_dict_copy, "dtype dict changed"
         tm.assert_frame_equal(result, expected)
 
     def test_reader_spaces(self, read_ext):

pandas/tests/io/parser/dtypes/test_dtypes_basic.py

@@ -246,10 +246,11 @@ def test_dtype_mangle_dup_cols(all_parsers, dtypes, exp_value):
     parser = all_parsers
     data = """a,a\n1,1"""
     dtype_dict = {"a": str, **dtypes}
+    # GH#42462
     dtype_dict_copy = dtype_dict.copy()
     result = parser.read_csv(StringIO(data), dtype=dtype_dict)
     expected = DataFrame({"a": ["1"], "a.1": [exp_value]})
-    assert dtype_dict == dtype_dict_copy, "dtype dict changed"  # GH 42462
+    assert dtype_dict == dtype_dict_copy, "dtype dict changed"
     tm.assert_frame_equal(result, expected)