Added "." on to check_dtype and obj parameter (#44446)

* fixed Issued No.#43755

* Added . on to check_dtype and obj parameter

* Revert "fixed Issued No.#43755"

This reverts commit 11f27df.

Author: Varun270

pandas/_testing/asserters.py

@@ -542,15 +542,15 @@ def assert_categorical_equal(
     left : Categorical
     right : Categorical
     check_dtype : bool, default True
-        Check that integer dtype of the codes are the same
+        Check that integer dtype of the codes are the same.
     check_category_order : bool, default True
         Whether the order of the categories should be compared, which
         implies identical integer codes.  If False, only the resulting
         values are compared.  The ordered attribute is
         checked regardless.
     obj : str, default 'Categorical'
         Specify object name being compared, internally used to show appropriate
-        assertion message
+        assertion message.
     """
     _check_isinstance(left, right, Categorical)