Removed trailing whitespaces

Author: thedataninja1786

pandas/core/indexes/frozen.py

@@ -110,7 +110,11 @@ def _disabled(self, *args, **kwargs) -> NoReturn:
         raise TypeError(f"'{type(self).__name__}' does not support mutable operations.")
 
     def __str__(self) -> str:
-        return pprint_thing(self, quote_strings=True, escape_chars=("\t", "\r", "\n","'"))
+        return pprint_thing(
+            self,
+            quote_strings=True,
+            escape_chars=("\t", "\r", "\n", "'")
+        )
 
     def __repr__(self) -> str:
         return f"{type(self).__name__}({self!s})"