Added relevant tests when removing single quotes

Author: thedataninja1786

pandas/tests/io/formats/test_printing.py

@@ -2,12 +2,33 @@
 # functions, not the general printing of pandas objects.
 from collections.abc import Mapping
 import string
-
+import ast
 import pandas._config.config as cf
-
+import pandas as pd
 from pandas.io.formats import printing
 
 
+def test_formatted_index_names():
+    # Test cases: (input index names, expected formatted index names as lists)
+    test_cases = [
+        (["'a", "b"], ['a', 'b']),            # Remove leading quote
+        (["test's", "b"], ['tests', 'b']),    # Remove apostrophe
+        (["'test'", "b"], ['test', 'b']),     # Remove surrounding quotes
+        (["test","'b"], ["test",'b']),        # Remove single quote
+        (["'test\n'", "b"], ['test\n', 'b'])  # Remove quotes, preserve newline
+    ]
+
+    for input_names, expected_names in test_cases:
+        # Create DataFrame with specified index names
+        df = pd.DataFrame({name: [1, 2, 3] for name in input_names}).set_index(input_names)
+        index_names_str = df.index.names.__str__() 
+
+        formatted_names = ast.literal_eval(index_names_str)
+
+        # Compare the formatted names with the expected names
+        assert formatted_names == expected_names
+
+
 def test_adjoin():
     data = [["a", "b", "c"], ["dd", "ee", "ff"], ["ggg", "hhh", "iii"]]
     expected = "a  dd  ggg\nb  ee  hhh\nc  ff  iii"